A 19-year-old is accused of attacking a mother and son at their Florida home while high on bath salt-like drug Flakka - just weeks after a frat boy stabbed two people to death on the same substance.

Nico Gallo, who smiled unrepentantly in his mugshot, is said to have 'cannonballed' through the front window of their home in Stuart, Martin County, before grabbing the 55-year-old woman.

She screamed for her son, who rushed to her aid and grappled with Gallo while she hit him over the head with a baseball bat.

Nico Gallo (pictured), 19, smashed through the front window of a Florida home before attacking a mother and son

He 'cannonballed' through the window of this home in Stuart, Martin County, while he was thought to be high on the designer drug Flakka

As her son held Gallo down, she frantically called 911, screaming: 'I need police! Someone just broke into my house! He broke through my window! I'm bleeding!'

She went on to tell the dispatcher she had 'no idea who he is' and that he 'went crazy'.

The woman claimed that Gallo first tried breaking through the front door and called out: 'Sorry, I'm going to die.'

VICTIM'S CALL TO 911 Victim: I need police! Someone just broke into my house! He broke through my window! I'm bleeding! Get off of him!' the woman is heard screaming in the 911 call. Dispatcher: Ma'am, I need you to talk to me. Victim: I just hit him with a baseball bat! I just hit him two more times! He won't leave us alone! He's just going crazy. He's attacking! I have no idea who he is! Advertisement

Officers said Gallo showed 'extreme strength and a high tolerance to pain', just as frat boy Austin Harrouff did when he killed a couple and ate parts of his victim's face and stomach in the same county two weeks ago.

And just as in Harrouff's case, Gallo did not know his victims.

The similarities in both 'unprovoked' attacks has led police to believe both men were high on the same 'designer drug'.

A witness told of how he and Gallo had taken LSD and a bath salt-type drug known as methylone, New York Daily News reported.

Martin County Sheriff William Snyder said deputies handcuffed the man and bound his feet because he was kicking them.

He said the attack showed all the hallmarks of Flakka as it did not appear in the database of the narcotics analyzer used by investigators

Snyder added: 'They're extremely unpredictable. Five people take it and one person goes crazy and goes on a rampage.

Officers said Gallo (pictured) showed 'extreme strength and a high tolerance to pain'

Gallo, who smiled unrepentantly in his mugshot (left), may have said the words 'sorry, I'm going to die' moments before smashing through the window

Police recovered the drug he appeared to have taken but are still testing it (pictured). During the attack, the assailant said he was on flakka, known as the zombie drug

The victim said the man 'cannonballed' through the front window and held her shoulders, frightening her

Police took Gallo to the hospital in an ambulance because 'he was too violent to be placed in a rescue helicopter,' Local 10 reported.

The mother was released from hospital after being treated for cuts from the broken glass while her son was uninjured.

'We don't know what we are working with,' said Snyder, who added that deputies had obtained a sample of the drug he was taking from one of his friends.

It's like Russian Roulette, it's so dangerous. This suspect had no criminal history, and now he faces life felonies Martin County Sheriff William Snyder on the unpredictable side-effects of Flakka

Just two weeks ago, 19-year-old Austin Harrouff allegedly stabbed to death a middle-aged Martin County couple and ate part of the husband's face and stomach.

Authorities still don't know what drug he may have ingested.

While Harrouff — dubbed the 'Cannibal frat boy' — has tested negative for most illegal drugs, officials are still waiting for results to see if he could have been under the influence of the dangerous drug flakka.

Dubbed 'the zombie drug', flakka swept Florida in 2013 — causing hallucinations, psychosis and 'superhuman strength' in users.

'It absolutely could be a flakka case,' Sheriff Snyder said of the Harrouff case. 'We don't know... I would not be surprised though if we end up finding that is the case.'

On the Sunday attack, the sheriff said the drug is either so new that it hasn't been updated in the TrueNarc analyzer, or it's a drug no one has seen before.

Just two weeks ago, 19-year-old Austin Harrouff (pictured) allegedly stabbed to death a Martin County couple — eating part of the husband's face and ripping flesh from his abdomen

Harrouff was home for summer break from Florida State University when he allegedly attacked John Stevens, 59, and his wife Michelle Mishcon, 53 (pictured)

Dubbed 'the zombie drug,' flakka (pictured) swept Florida in 2013 and is believed could be the cause of both incidents

Deputies said Harrouff, who was home for summer break from Florida State University, attacked John Stevens, 59, and his wife Michelle Mishcon, 53. Both died at the scene.

Harrouff has been in a West Palm Beach hospital since that night. On Friday, authorities said he regained consciousness.

Snyder said he'll be charged with two counts of first-degree murder when he's released from the hospital.