I imagine that I'm doing a standup. So I have some recoveries ready.
Wow, that joke was so bad I would hear a cricket if this was a movie.
Nevertheless, my grandma thinks I'm funny
Strange, last time I told this joke it was so well received they told me not to come again to comedy club... WAAAIIIDAAA MINUTE.
I will shut-up now.
Just show that you acknowledge the joke was so flat it wasn't even considered a joke and move one.