Air mattress

Am about to go to bed, considering I have to get up at 6 in the morning! Boat school remember? Anyway, when we got home from the lake I asked my friend to help with my air mattress. He has an automatic pump. Good. Tiny problem was that it was connected to his car battery (lack of adapter-problem) but we solved it through having him bring the air mattress to the car. Easy. So there he was. Pumping. It took some time but finally it worked. Imagine our disappointment when we 2 hours later realized air was seeping out somewhere. Located the problem (or so we think!) to one of the plugs. Friend suggested to manually pump it up again and asked me to step on the mattress to check. I giggled rather loudly. Only to realize flatmate is sleeping. Ouch. Friend said: "he probably wonders what we do". Told him that I would tell him the true. We're just pumping away...