When i woke up it was about 7 am, and as any other male, I had morning wood, which my mom happened to glance at.
I fell asleep, with my mom driving (I was in the passenger seat). I was on a trip one time which made me be in a car for 30 hours straight. Thankfully, with the angle I was standing and my tux, it was mostly hidden. Took almost the entire ceremony to go down. My wife was showing some serious cleavage, as were the bridesmaids.
I got a boner during my wedding ceremony.