Urban Shooter

So, I was down at Performance this afternoon and they had a cheap pair of tires for $5 each and the old Nishiki was in need, so I figure it's a good deal and I buy a pair. Get home, mount them on my wheels and start pumping on my two month old Topeak Joe Blow Sport pump, wham, the handle snaps off the piston on the downstoke and now I have a 12 inch scrape running up my forearm. Luckily its just a superficial scratch but that's the first time anything like that has ever hapened to me. Has anyone else ever had there floor pump break like that? I'm sure it may be common if you've had it a while but this one is only two months old and I don't use it all that much.