Mattresses are not sturdy and coupled with wind it is very easy for them to fall out of a bed and take you with it. How do I know? Because it almost happened to me. The driver was going over Wrightsville Beach bridge and I was in the bed with the stupid mattress. I couldn't hold it and started beating on the back window to slow down and luckily the driver did. I was stupid for doing that. People tie the mattress down or rent a covered truck. Noones life is worth a stupid mattress! So sorry this young person lost their life.