First post on the forum ... long time lurker and festool user. 110v can do damage! A coworker of mine was installing our cabinets on a bathroom remodel, and was told by the GC that the outlets that needed to be pulled through the back were shut off at the circuit breaker. When he pulled the outlet through, he grabbed it with both hands (completing the circuit through the chest as mentioned above) and was seriously shocked ... his memory is that he could not let go and was being shiocked for 10-15 seconds before using his legs to push away and throw himself off. It caused heart palpitations, an ambulance ride, and an overnight hospital stay. Granted this fellow was possibly not in the best heart health, but it was pretty scary for him and those on site, and quite expensive for everyone involved (GC using unlicensed electrician, which we had no idea about.) Our policy now is to turn off circuits at the breaker, verify with a multimeter, then electrical tape the connections, then still handle the wires like they are live.
Sorry to keep dragging this thread off topic, but be safe folks.