The federal member for Solomon Natasha Griggs has been accused of pushing the phone from the hands of a union campaigner and acting in a "hostile" and "aggressive" manner at a community event.

Video footage of the incident obtained by the ABC shows childcare worker Cecile Chavez, wearing a union "Save Our Weekend" t-shirt, approach Ms Griggs at the Palmerston markets, questioning her about weekend penalty rates.

Sorry, this video has expired 'Don't video me': Natasha Griggs confronts protesters

Ms Griggs then approaches another union campaigner filming the situation and requests to not be filmed.

Ms Chavez said Ms Griggs is responsible for causing the phone to fall.

"She approached the member and pushed the phone down," Ms Chavez said.

Ms Chavez says the confrontation left her in shock.

She said during any past meetings with Ms Griggs, she had "found her to be very pleasant".

"After last night? Very unprofessional, very hostile, very aggressive, I've definitely got a different view on Natasha Griggs," Ms Chavez said.

I was set up, Griggs says

But Ms Griggs labelled the situation as "nothing more than a union set-up".

"I put my hand up to block further phone footage being taken [and] without hesitation she dropped the phone to the ground," Ms Griggs said in a statement to the ABC.

"As soon as she dropped the phone her fellow union protestors began chanting immediately against me.

"As far as I am concerned that is the end of the matter."

The person holding the phone declined an interview.

The "Save Our Weekend" campaign website states it is fighting to protect weekend penalty rates, led by "Australian unions, including the Shop, Distributive and Allied Employees' Association and United Voice".