Fairly dangerous and not very smart. To do a speed test on a piece of moving equipment without it being properly bolted, anchored or secured to the floor, is just asking for trouble. Swing that arm too fast can cause perpetual motion to take over and send that thing to the floor, or worse slam it into yourself. That particular robot weighs in excess of 1,500 pounds, with no caging, no safety distance, exposed control and power cabling, just not a very smart thing to do.
The machine has fields defined for safety. If it reaches that field, it stops. Doesn't matter how fast it's moving. It's an emergency stop. Another thing, which I consider it as a golden rule when I'm working with these robots, is that you NEVER EVER test your program outside of T1 mode.
i have, hey wanna try something cool? go ahead rules in industrial settings are there for a reason most of them because of fatal deaths, did you know in a press machine designed for large trucks the human body becomes like bread crumbs? funny how fat, meat and bones does this.