Note to others (and, no, this is *not* a note to self, because I will not forget):
When climbing over seats at a hockey game be careful! If your leg should slip and get wedged between the parts of the seat, fight the impulse to just yank. This will cause you to hurt your knee. Also, resist the temptation to just pull as hard as you can in a panic to pull your foot out. This will result in scratches and bruises on both sides of said stuck foot. Instead, remain calm and figure it out.
Thankfully, I can walk normally again today.