Sounds pretty reasonable to me. In my case her leg only twitches when she's moving or she's putting force on it, say she's leaning on wall using that leg to support her weight. It also shakes slightly when its fully stretched. However, I doubt anything that could cause internal leg injury to a large T. Simply climbing walls or curling up in corner or hunting will not cause leg injuries right?
As simple as stay hanging from one leg if it gets stuck somewhere at the top.
This is hugely overblown, a T is not gonna die from somebody spraying air freshener in another room. I doubt anything would happen even if you sprayed air freshener directly at T itself (not that would recommend to do that, treat your pets with care). It's some sort of another issue, most likely related to molting. I would just wait a few days and see, as I don't think you can fix something like this. I am inclined to think that the problem would resolve itself with the next molt.
) can pull a muscle, a Tarantula undertaking the intense physical exertion of hunting could hurt a leg internally?
We've been through this buddy. There's nothing you can do even if there is something majorly wrong (there probably isn't) just wait it out.
Well I wouldn't call it overblown, unprobable maybe, because you don't know what kind chemicals are present on that spray. Some phenols are toxic to invertebrates, so I won't discard it completely.
I'm sorry to hear that. You could make another thread about your pamphobetus and we could do some investigation