Everybody Limbo!

Summer camp has started at Nick's school. Guess since they're year-round, they like to give the kids a bit of a break. Each day is some new activity. I was reading the list to him and got to Lua Day. It talked about playing limbo and the types of food they were going to eat. Chris then asked Nick if he knew how to limbo and Nick immediately arched his back as he motioned going under a stick. Huh? Where'd this kid learn to limbo? Has he been going to resorts without us?