Help, I can't get off my creeper

I have a Challenger 9,000 lb 2 post asymmetrical lift that is 13 years old. Like OK Collector , this lift is used for much more than just my resto/hotrod hobby. I had the ceiling clearance when I installed it , so mine has a two foot height extension on it. This allows you to lift high top vans and trucks to full walk under height. I regularly have trucks in excess of 9500 pounds on it without issue. Most lifts are under rated for obvious reasons. Paid less than 3 K for it 13 yrs ago.