One of the kids friends put his pool mattress in the back of my truck yesterday after we went swimming and didn't tell me or I would have closed the lid. Driving down the Hwy, it flew out and hit a BMW a few cars back, then bounced off and hit a truck. Huge OMG moment. Damn. I should have let him out, but moreso, I should have checked. Kids all laughed- except the kid who lost his mattress…