49. The Way to Trip Over Chairs
In full honesty, this is definitely never one that occurred to me, but it is certainly a truth in hindsight. Chairs being pushed out haphazardly and left around to bump into make it hard to move around and will leave plenty of people with mysterious bruises on their legs.

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It’s such a strange habit to point out, but all the more reason to call attention considering how many people probably don’t even think about it unless it’s their job to make sure chairs look nice, like if they work at a restaurant or something similar.