So we found a pill at a dance. I threw it in my wallet so I could look at it the next day. It has SZ or ZS on the front of it... or back, whatever. On the back, it had nothing except for two - - on each end of what I'm thinking was suppose to have a number in between. It's light blue in color. It's round. About the size of a normal eraser head. Maybe a tad bit bigger in diameter. Wondering what kind we are looking at. If it's a controlled substance, I'll notify the local authorities.