I've never seen anyone do it with a Goodall mast, down boy!
Chris P and I did it a few years back at Tradewinds (and won)... Taylor was following us the entire time yelling that our mast was about to break... I think he just wanted us to slow down.
Done properly, they can handle it. That said, we have also broken a mast doing it (okay so it was Chris and Dan... weighing 100kg each ;-). Officially I wouldn't recommend it.... Much like you aren't supposed to drive 200 Mph...... still can be fun though