The boo run in meridian is a 5k race/zombie chase. Seriously- you are chased by zombies as you run. If you are caught, you are a zombie and have to catch the other runners.
Eric needs to do this run. He has been preparing to be chased by zombies his entire life. We have stockpiles of things for such an occasion. He needs to do this.
And just to add, Meridian is apparently THE place to go for Halloween fun. These folks take their boo seriously. Check it here- http://www.boo-meridian.com/