Ouch. Yeah, you factor in getting showered and dressed, then driving to the theatre, buying drinks and all that... not so much.
Happened to me once too, some thirty years ago. Only it was my crotch that was totally blown out. Took me quite a while before I realized why people were staring.
I got home that night and changed into shorts and threw my pants on the bed. Came back a while later and could see this giant hole and I was like DID I GO OUT LIKE THAT?! I called my date and she was like oh yah I was gonna say something but didn’t want to embarrass you… gdi lol