On the subject of the former above, hate when the person before doesn't leave a 'tail' hanging from those 'big wheels' Shopping Centres' use.
Because you can't 'see' roll, you've no idea which way it'll unfold, so you roll it one way, no result, roll it the other way, & BINGO!
I now only go into cubicle there, if I can see a 'tail hanging'. This, of course, is providing they're all not being used! Sometimes the 'situation' is dire, so go into whichever vacant! Such is life as we get older!