I get absolutely zero engagement on this at home, so here goes:
1. If there is a slapstick scene where something painful or potentially lethal is happening, it’s important that the viewer knows that the character involved is fine.
2. If a known TV personality is in an ad, it’s important that he/she is addressed by their real name in the script. That way, there is no need to pay IP royalties to the show from which they made their name. Cliff from Cheers advertised beer, pretty much playing the Cliff character – yet they were careful to call him John.