I have had 2 tubes explode on me. The first was when I installed a folding bead Vredestein Fortezza Tricomp on an Alex DC19 rim. The tire was making almost a snapping/crackling noise after inflating and them BLAM! The second time occured while riding down a hill when my front tire tube exploded on a Mavic open Pro with Michelin P Race 3. Luckily the tire did not get wrapped around a caliper or anything. Both of the exploding tubes were the result of me not knowing how to properly check to make sure the tube is not pinched as well as making sure the valve stem portion of the tube is properly seated in the tire as well. The last thing I do is push the valve stem in and make sure it is not stuck. It should move freely in and out when properly seated. I have not had an es-ploding tube since.