After Reebok’s new ad campaign featured Helena Christensen wearing nothing but a pair of sneakers, Nike must have been so jealous. And just like any head cheerleader who would challenge the new girl’s roundoff by doing a roundoff plus a back flip, the stakes have summarily been raised in the naked-people-in-tennis-shoes game.

[youtube=http://www.youtube.com/watch?v=m474JNTLKnQ]