And for that matter, even possible to orchestrate.
I've always thought it would be awesome if our elite angriest crowd in america could start a unique yell. Keep in mind it would probably need a few games to get down and Willy would play a big part in it. When the opposing player is shooting a free throw, the crowd would be screaming like normal. As he's starting his shooting motion, the crowd instantly goes silent. Willy would need to keep his hand up while the crowd yells and chop it down to stop. On the second free throw, if there is one, do the opposite. Stay quiet and start screaming right before he shoots.
Seems like it could be cool if done right.