Well, we know one thing: former Texans Pro Bowl defensive end Mario Williams likes fast cars and guns.

Williams posted a photo on his Twitter account early Friday morning of a gun with a silencer attached, along with the message “Shhhh gnight world.”

Silencers are legal in Texas but not in New York, where Williams will spend much of the year after signing a six-year free-agent deal potentially worth $100 million with the Buffalo Bills in March. Williams said on Twitter today that he was in Houston.

Having a silencer, as long as the gun is registered and the owner has the proper paperwork, is permitted in a majority of states, including two (Texas and North Carolina) where Williams has lived.

Later, Williams tweeted: “Texans. I always promote safe and legal handling of any firearm. I have and always will collect things I love LEGALLY!”

Back in 2007, a video surfaced of Williams driving his Lamborghini at speeds in excess of 150 miles per hour on a North Carolina freeway.

A request for comment through the NFL was referred to the league’s policy on weapons.

According to the policy, NFL players are not banned from owning weapons, although it is strongly discouraged.

“If you legally possess a weapon, you must understand the local, state and federal laws that apply,” the policy said.

In addition, the policy states, “if you take a weapon from one place to another — for example, across state lines — a different set of laws may apply in the new place.”

Any violation of the gun policy could not only result in suspension but possible criminal prosecution, the policy said.

In a 2007 interview with The New York Times, Williams said the driving incident “taught him a lesson” and he added that he has a passion for shooting guns “every chance I get.”

At the time he had a collection of 10 guns, according to the Times, including a .50-caliber Browning machine gun rifle, a Desert Eagle pistol and AR-10 and AR-15 rifles.