First off, let’s clarify that there is a difference between being hurt and being injured. The two terms get interchanged quite often but there really is a huge difference between them. If you are hurt, you are merely feeling a sensation of pain (which can be either metal or physical). Yet, when you are injured, it physically means that something is wrong with your body. This could be a tear, broken bone, or severe sprain, for example. So, to now answer this question, yes, you can get physically injured on one. Again, it sounds like a broken record, but it comes back down to technique and safety.