I'm always absolutely terrified I'm going to catch a small child with the huge, heavy trolley.
^^
This - so many families (mum, dad, Nan and grandad plus several kids in tow) come to the supermarket as if it's some exciting day out, and let their kids run riot, and then tell their kids we'll lock them in the freezer if they don't behave! (yes this happens). The picking trollies are so heavy when full, and when parents let their kids deliberately jump in front of our trollies for shits and giggles (yes, this also happens and parents smile indulgently as if it's somehow endearing to us), it's really hard a) to stop suddenly without doing either yourself or the kid an injury and b) to plaster a polite smile on your face in spite of wishing that you keep your kids under control because what they did is just fucking stupid and dangerous.
And I say that as a single mother of 3, one of whom is autistic and needed extra supervision in shops.
We work hard, we are not trying to make other shoppers' lives difficult. It's hard, heavy and physically exhausting work. It's easily 20,000 steps in a 4 hour shift and it's knackering.
We're just trying to earn a (not very high) wage and avoid getting told off for not hitting ever more demanding targets from management.
Thankfully I don't have to do it any more but I spent a significant part of lockdown doing it as my normal work dried up overnight. It's brutal but we really aren't out to piss anyone else off, I promise!!!