That's a funny statement. "Sleeping on a bicycle." It's not too far from the truth, unless you're using a higher scaling and robust designed electric pump with precise pressure application.
Just a warning to the brothers though, if you're finding something similar to the
MityVac, do make sure to have similar safety specs in the back of your head. The most critical is the safety release valve, with secondary quick disconnector with a second relief valve if one happens to fail. Most critical is thicker acrylic
cylinder. Poorly made acrylic
cylinder will implode over a short period of time. You don't want to have acrylic sharpnels slicing your penis apart.