Every time I see someone placing a bag that does not close into an overhead I shudder. Today my fears (well, someone else’s actually) were realized. As I was waiting to deplane someone opened the overhead in front of me an a laptop fell out. The person behind it reacted quickly and saved the laptop, but that could have been a bad situation for the owner.
Zip your bags when they go into an overhead. Be careful when placing bags without zippers or buttons in the overhead.