A few minor injury's but major pains come to mind.

Jammed finger or toe
Splinter under a nail
Scratched eye
#$@%&^* chigger bites
Smashed finger/toe

And the grandaddy mfer of all of the minor injuries I have ever experienced was once when I had Carb Cleaner all over my hands and stepped around behind the house to drain my willie. Never, Ever do that. I had sores that bled and oozed like a blood blister for several days. No nasty women involved, I promise.