When I was a little kid, I got to go to the circus at the Chicago Amphitheatre twice (once withg my school class). This would have been mid 1950s.

On both occasions there was a stunt wherein an "ape" (no doubt a performer in a suit) ignored his trainer and jumped a fence into the crowd. The whole section cleared. Parents had to calm down scared kids. It was all a stunt.

Can you imagine that going on today?

(The Constitution doesn't say anything about crying "Ape!" in a crowded stadium, eh?)