I lift weights 5 days per week. Today I was at the end of a chest workout and was doing dumbbell bench (flat bench) with 95lb dumbbells so heavy but not a PR. I was feeling good and it was moving smoothly. A few reps in, suddenly my right failed. By failed, I don't mean the regular stalls out and you can't make the rep. I mean was going smoothly up and dropped like the muscle just quit working. The failure happened in a split second. I exited safely and dumped the weights. There was no pain and no feeling of strain. Just a sudden complete failure. No pain or injury afterwards either. I have never experience anything like this before. And it is not a tear, I have done that before and tears hurt. The question: Have any of you experienced this or know what might have caused it?