It’s the paper cut law.

Having your leg wrenched off at the thigh by a syphilitic alligator: 8/10

Banging the back of your head on the corner of the open cupboard door as you stand up from a crouch: 11/10

I totally get this. I think when something really serious is happening, I automatically suppress emotions in order to stay functional, but when something that’s ultimately not a big deal happens, I feel like it’s “safe” to be upset about it.