President Donald Trump’s idea to arm teachers as a way to prevent school shootings as been met with some pushback, especially from actor Samuel L. Jackson.

The veteran Hollywood actor took to his Twitter Friday to tear apart Trump’s idea: 

“Can someone that’s been in a Gunfight tell that Muthafukka that’s Never been in a Gunfight, the flaws of his Arm The Teachers plan??!!” he said.

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His post immediately went viral. 

Trump made his comment in support of arming teachers Wednesday during an emotional listening session on guns that included survivors of the Florida school shooting attack.

“If you had a teacher who was adept with the firearm, they could end the attack very quickly,” he said according to CNN reports.

“This would be obviously only for people who were very adept at handling a gun, and it would be, it’s called concealed carry, where a teacher would have a concealed gun on them. They’d go for special training and they would be there and you would no longer have a gun-free zone,” Trump said. “Gun-free zone to a maniac — because they’re all cowards — a gun-free zone is ‘let’s go in and let’s attack because bullets aren’t coming back at us.“