So browsing the interwebz I ran across this interesting little tidbit. It's an old subject at this point, but I've never heard about our old boy Westphal doing a chokesign as well in his lifetime. The post is about 1/3 down the page but I'll quote it here:
"So we all know about the now infamous DeMarcus Cousins choke gesture during the Kings vs. Warriors game and he's been benched for it. I couldn't help thinking about how his coach, Paul Westphal, had made a similar gesture (a two-handed one at that), back in 1993 during game 6 of the 1993 NBA Finals after Dan Majerle missed a 3 that might have sealed the game for the Suns.
Of course he wasn't doing it to an opponent and it was as a joke but it's still interesting that the choke gesture seems to curse one's own team."