Trish Stratus was taunting an angry Stephanie McMahon from a sun roof of a limo. Stephanie made a dive for Trish and would have gotten away except Trish's rack prevented her from escaping. After the spot was over, Triple H who was holding Stephanie back was laughing at what happened.
Dude, that's Kayfabe. Not a slipup.
Kayfabe = A moment in WWE where it is made to seem like something happened for real, but was staged. It was a little joke that the storyline writers would of added in.