One time in class when I was really sick I coughe into my hands ad a huge ball of snot came out (f*cking disgusting I know) and right then someone passed papers back and it got all over them, instead of passing them back I just got them and threw them out. I told the teacher that something was on them and I threw them out

luckily I didn't get caught but it was still the most embarrassing disgusting moment of my life.