We've had a rash of blow-offs building the BSO's (bike-shaped objects) at the Big Smiley-Face; a couple were due to the bad beads they come with sliding off the rim (I'm SERIOUS!), BUT ONE WAS REALLY SCARY -- a 12" Huffy toddler bike. Inflated to about 30-35 psi -- and the CASING SPLIT ALONG THE CENTER OF THE TREAD! Tube blew out right through the hole. When we looked at the thing, there was so little rubber in the casing that fibers were visible all around the inner!

We still have that turd on the wall....