I have given myself the tiniest possible burn blister, head of a pin tiny. I cut myself a piece of bread to toast and didn't notice that there was a small blob of jam on the bread board. I toasted it, took it out of the toaster with tongs and then held it to steady it while I buttered and managed to put my finger on the tiny blob of jam that had been toasted to super hot. I yelped and DH thought I had cut myself or something serious. 