I have spent a lot of time in the company of dry ice and yes my favourite trick was to use it as a smoke machine effect when I was done. Other favourite things to do was pouring liquid nitrogen on the floor. I was a terrible scientist.
Just reminded me, when I worked in labs and was going away camping for the weekend I’d take polystyrene boxes of dry ice home on a Friday night and hey presto you’ve got a mini fridge and drinks cooler than you can chuck away at the end