"I loved shooting my grandpa's wedding. I loved meeting my new family even more. That's my new uncle, the only person who's jumping in this picture."
So the maid of honor and I negotiated this shot with the photographer via silent gestures and nod, right behind the bride's back, on-the-spot during the pictures. It was our one goof move, and the MOH has the classic musical theater "stage moment!" look, while I have my maniacal mad-scientist elementary teacher face on. She had no idea until she got the pictures back!