I've heard willow is bad for bow wood. I've had a couple blow up on me, luckily I haven't had the anything come back to hit me. But those explosions plus the tales from others caused me to build my tillering rig with pully system. Had a couple break on there, only one really blew up on it. But I was standing 12 ft away so all was good. I make sure I pull it on that rig well over a 100 times once I get it to draw length, not to mention all the pulling to get it tillered there. Once I have pulled it a hundred or so times, then I'll take the bow off and put some arrows through it, wearing my cap with small brim and safety glasses for the first 50-100 arrows or so. It can obviously blow up after that, but I figure those are the most likely times for it to blow up.