I was doing my casual tuesday experiments class. Me and my 2 "coworkers" were given the task of creating a function that gives radiation as a function of distance. I was given a sample in a black box, the rest of my team was on the sensors. I took it out and it said "Do not handle unless out of absolute neccesity" I had no tools to hold it so I used my hands. In the manual book it said it emotted beta and i think rays too and I thought I fealt little stings during the experiment. I would feel a needle like sting from time to time. I am not sure if I was having a placeebo effect, or if it was something else. Or if it was rays hitting something in my nervous system, triggering a "sting". Tl;dr: what does high energy radiation feel like?