"I just have to see what he's going to do and how he's really going to follow through on certain things." Robert De Niro is not going to follow through on his viral video threat to punch Donald Trump, the actor told Jimmy Kimmel on Wednesday night's Jimmy Kimmel Live! "You could now get arrested for that, I think," said Kimmel of attacking the president-elect. "And as we even see now in a lot of cities, there's a lot of people getting very upset and protesting."