I messed up my hip earlier this week... the abductor that I usually use is broken so I used the other one and had the "empty jug of milk" syndrome even though I set it at my usual weight, and knocked something out of place. Then I added 20 lbs and did too many sets and walked 10 miles uphill over the next 2 days days until it was really good and fucked up.

Time in the therapy pool and the whirlpool have improved it though.