P.E tent
When you're in the P. E. tent, you're trying to get changed, and out of nowhere, your boner hits you and the teacher walks in.
He was just trying to get changed when his boner hit him. The teacher walked in and he was busted.
The teacher walked in right when he got a boner. It was like it was planned.
He was getting changed and got a boner. The teacher walked in and it was like the worst thing ever.