When unforeseen problems force me to go out despite severe ME/cfs, things can get pretty rough.
I had to go out today, needed to send off some paperwork, but my printer ran out of ink again - just changed it about two weeks ago! I needed to print off a load of sheets, so I had to take a bus to get that done at one place, then off on another bus to find a post office to send it.
By the time I got to post office my legs were not working properly anymore, it was like I was wading through lead or mercury, let's just say Nutella (have to keep things positive!). I had shooting pains all over the place, so was reduced to waddling at snails pace (seriously) at one point I thought I wouldn't make it across the road, but the bus driver was patient and waited for me to get safely out of his/her way.