Went to the doctor (orthopedic surgeon!!!) today. Looks like it could be torn cartilage in the knee...we'll watch it for a few days, then look at an MRI and a scope.
I guess this what you get when you make fun of your pastor for not wanting to play the second game of Laser Chase because his knee was bothering him and he wanted to make sure he was OK to play softball in a few days.
Note to self...don't make fun of the pastors car or haircut.