Just being an old wreck crawling about on the road in near freezing temps. Pushing and pulling in unusual vectors. Needed a hammer to get one pad out.
When I'd finished, I couldn't get up, was in an 'L' shape on the road. Took me 5 crawling trips to get the tools back in the house. Was mostly on all fours for 2 days, then on a walking stick for another 2. Today is day 37 and I am still in discomfort, but can ride the bike.