Gross or funny?

One day I was teaching a second grade class that was working on a watercolor project. All of the students were very focused on what they were doing. I was walking around the room making sure all the students understood what they were supposed to do and helping those that needed help. A small, quiet boy raised his hand. I walked over to him, leaned down so that we were eye to eye and said, "Yes?" He said calmly, "A booger fell out of my nose and onto my painting". I looked at his painting and sure enough, there was a quarter-sized puddle of snot. I told him to wipe it up with a paper towel, and then I walked away quickly not sure if that was really disgusting or if it was the funniest thing I had seen all day!