Veterans of RHPS(Rocky Horror): what are your favorite audience participation moments?

I was reminded about this by a Q regarding cult films and fondly remember all the midnight showings I attended in Philly.

I’d also be curious about whether there was much variation from one part of the country to another. So, could you also include which city you were in when you went?

I think this was pretty much a US phenemenon at the time but other countries are welcome to chime in if applicable.

Which props did you bring? Did you come in costume as one of the characters? I’d love to hear about your fond memories and favorite moments.