Mosquitoes drive you crazy and turn you evil.
While leading an Explorer canoe trip in Canada the mosquitoes were so bad many of us stopped swatting them and, instead, when we found one with it's nose sucking our blood, would pinch our skin, trapping it in there and unable to stop the flow of blood till it burst....
That was the first trip we made...we switched to Cutters for the following trips and the problem was much reduced...