Be very glad. I took a header off a 12 footer due to heat stroke while carrying a 5/8" sheet of plywood. My back still isn't right. I leave ladders to the pros these days. No good will come from messing around with those things and heavy loads. 
FQ13
Hehe before the good old day of OHS came in I used to work in a hardware/dept store with high shelfing, bottom was for merchandising and the top and middle was for stock, highest shelf was about 15ft off the ground, dunno wht but we never questioned climbing up there on ladders carrying Microwaves and Tv's etc. The Big tvs back then was the 68cm old fashion tube types, they required two guys one on a ladder each with the box on a shoulder each LOL Dunno how no one was ever killed.
The funniest thing I saw was a guy putting some stuff up on the high shelf from one side and inadvertantly pushing a box off into the next aisle, he hit a customer, luckily the box was full of light paint rollers, however the guy refused to see the funny sight (rightly so) to the utter shock of the guy who did it the fella ran around the aisle mad as hell, ironically he had been to the garden dept just before and still had the axe in his had he intended to buy while going off his head, the sales guy shit himself and ran for his life thinking the guy was going to make kebabs from him LOL
e heights I dont have a issue just more wary these days about my getting older and increased chances of not landing well if I do fall.