The pull-out hose puts less stress on the valve. And you weren't stressed to start with. It's all very well hauling a giant pump around, but all that leverage can snap a delicate valve stem right off.
The 26" OM Flyer is a bike with some serious history. The "OM" in the name stands for "Old Man," which was the nickname of SE Bikes founder, Scot Breithaupt.