A lot of guys take great pride in working on their own vehicles - which is a commendable thing. Anyway, this guy wanted to do some spring cleaning of his truck and removed the back license plate. Judging by the photo, it seems the backside of his truck hadn't been cleaned for ages, just look how thick the dust is that appears on the outer metal layer.
What the guy didn't expect to happen is to find a wasp nest behind the license plate. Just as he removed the plate, wasps started to emerge from behind, several in a row, almost like an army. That's when he promptly took out his phone and made the photo. It's quite scary to imagine the level of shock and fear he must have felt during that moment.