Imagine the number of mistakes you’d have to make to amass a pile of eraser shavings big enough to make a sphere as big as a softball.

One Japanese schoolkid knows for sure, saving eraser shavings from his first year of junior high school on. His friend snapped a picture and posted this amusing tweet on Twitter:

“My friend has collected eraser shavings since the seventh grade. He needs to get his head examined.”

Source: Twinavi.jp