Haven't seen any like that, and I've been to Vegas. The casinos I went to mostly had lemons and cherries and horeshoes and the word "BAR". Some slot machines have themes, like under the sea, the old west, etc.
But hell, I'd be dancing like a leprechaun if I won the jackpot!
I actually did win over $300 once, but I didn't dance or do anything but sit there staring at the machine because A. I was numb from the shock of my first "big" win, and B. I had no idea how much I'd won until the machine was done tallying up my winnings, which seemed to take a long time for one of its smallest jackpots.