That's funny.
About 40 years ago I rented an electric jackhammer to cut a portion of the driveway and run a drain line from the relocated washer to the outside sewer line. I guess maybe I did something wrong by pushing down too hard instead of letting the jackhammer do its job. The handgrips had built in spring action I guess for a reason. By applying constant pressure on the handles instead of letting the hammer and springs do their job I swear I messed up the nerves in my hands for a long time. Tingling in my hands, some to think of it, since I havent thought about it. I no longer have that tingle.