Valve has announced its latest Mutation in Left 4 Dead 2, and funnily enough it's called Last Gnome on Earth.
In this zany Mutation, you have to protect the garden gnome at all costs, and carry the little bugger around with you from start to finish in any campaign.
The common infected hate the Travelocity spokesperson, and will swarm the player carrying him. If you set the ceramic fella down, a boomer explosion could send him flying far away from you, so don't screw up.
You can check out the official announcement over on the L4D2 blog, and while you're there, you can vote on the Mutation you would like to see make in encore game presentation.