Happened to me this week and its turning out to be a huge setback for my cycling goals as I have not been able to train on the spin bike and probably will not be able ride this weekend.
As you say I have a lot of injuries because of the risk of progressive lifting. I know very few people train with this type of load, but to be progressive with the resistance load there is risk involved. I pay special attention to my form and technique, but injuries still happen.
Most significant injuries that have occured in the past 6 years.
Muscle strain/torn fibers:
2 on my right quadricep
2 on my left quadricep
2 on my right hamstring
2 on my left hamstring
Other injuries:
rotator cuff
2 times inflamed/bulging disc (1 occured this past Monday - current rehab)
I feel pretty blessed because I have friends that have had far worse. Like torn pectorals or rotator cuff injuries that required surgery.
My one significant bike injury so far was with the pavement typical road rash with a hematoma that had to be drained 3 times, but I was able to continue riding during recovery.