Rose Byrne of ‘Bridesmaids’ got more than she bargained for on ‘The Tonight Show’ Wednesday night when Craig Ferguson gave her an impromptu lap dance, complete with hip gyrations.

Bryne explained that co-star Kristen Wiig hired a party bus and took the cast on a “bonding girl’s night” to a L.A. strip club. While there, she received a lap dance from one of the strippers.

In order to provide a graphic illustration of exactly what happened, Ferguson climbed on Byrne’s chair, thrust his pelvis in her face and rolled his hips. And, since any lap dance would be incomplete without it, he smacked his own butt as well.