If you’ve ever had trouble inflating your air mattress, you might find this trick helpful. Watch Dave Hax show you how to pump up your air mattress – with no pump! This method could come in handy if you forgot your pump or if you don’t have access to an electrical source to run the pump.
I had no idea you could do that with just a simple garbage bag. It seems to me that you still might have to ‘top off’ the bed with a little more air, otherwise it might not be firm enough for your liking.