It's an emoticon. When you type a comment, at the bottom on the box is a link to emoticons. That shows you HEAPS of different codes to use to get little icons come up. Type : clap : (without the spaces) and you will get
This is how I've always pictured it. Despite the bright colors and campy music, they're fighting for their lives against pure evil. It's raw, animalistic survival instinct. I mean, these are plumbers without their tool, their devices. They're pretty desperate and you did a great job representing that.