In fact, it can be very dangerous IF you don’t elect to use your brain! Hydrogen or any gas system using hydrogen is not something to mess around with! I’ve heard of some idiots that have tried to ignite hydrogen as a means of amusement… DUMB! “Well, I just needed to see if it would go up in flames,” one woman stated. Of course it ignites, duhh? Hydrogen will blow-up if you put fire of any kind to it and rest assured it will fan rapidly.