Once during lunch, one kid banged his head against the table. (You'll find out why later.) He was my friend at the time, and apparently he hit his mouth, and his mouth was bleeding all over. He was bawling and I walked him down to the nurse's office. The nurse asked him what happened, and between sobs he said, "Why does red food coloring taste so bad? I can't get it out of my mouth!". It turns out, he was fine, and it was red food coloring coming out of his mouth, not blood. He hit his mouth against the table because the red food coloring tasted so bad.