I'd thought I'd overdosed on Skittles. Soon after, I was chasing players around all over the server, trying to eat my laptop screen, mistaking them for rainbowz... :c
Well... I nearly destroyed the laptop screen in the process. But with rainbow mode on, look at someone wearing gold/diamond armour... whenever I try it, I start drooling...
I crashed completely. I'm pretty sure it's just a troll function. It doesn't sound like it has much function otherwise. I just wouldn't click it if it crashes you.