… is when one is in pain. And usually it's my wrists that annoy me (though lately it's occasionally my whole arms or sometimes my eyes or my head or…) but lately it has been my back. It's only a mild annoyance but it's hard not to go and stretch tons (which doesn't work — the last time I tried that — the first day that my back was being annoying recently — it resulted in more pain, which was exercised out — but it's not like exercise is really likely or possible while working at a supermarket).
Realistically it's one of the only downsides of this job when I really want to be thinking of other things (personal development, school/thesis, friends, life in general etc.) in my life at the moment and moving toward other goals. The other downsides are perhaps more expected. And it's not like I haven't gotten various of my pain related symptoms examined by doctors over the years (no answers yet — and since I can still work through the pain as it's generally not earth shatteringly annoying or anything, I don't worry TOO TOO much). Though really, I ought to be honest with myself that pain has interfered with a lot of my productivity this year.