I used to run a live theatre (1,600 seats, 300 shows a season - concerts, live theatre productions, silent movies, local dance recitals, the works). We had a Genie lift that had the outrigger safeties bypassed - you could run up the pole without the outriggers in place. Our focus height was generally around 25' from the deck, so I'd be at focus level and simply grab the batten (pipe that holds the lights) and pull myself along to get to the next light, without dropping the Genie.
Only one time did someone leave an extension cord on stage...I was rollin' along to the next light, Genie wheels caught on the cord....I grabbed the lighting batten...the Genie toppled like a dead tree as I swung my feet up to the batten and hung there like a cat, hollering for my assistant to get the hell up on stage and fly the batten in for me! He managed to get it lowered to the stage (slower than gravity, fortunately!), and we got the Genie back on its wheels before anyone found us.
I'd also always get the call to be focus monkey when the big tours came through, using box truss - a 2' square truss that traveled with the lights inside it, but you drop them down to focus and use for the show...then pull back up for travel afterwards. I'd crawl along the top of the truss (hanging 60' above the auditorium from two chain motors) and reach through it to focus the lights for the show, then climb from the truss to the Genie basket to get back to the deck.