Sticker caught in Xbox 360?

Today, I borrowed Halo Reach from Hastings and there was this sticker on the disc. The sticker told about it was from Hastings and this other stuff. I heard this clinging noise while I was playing, and I opened the Disc Drive and the sticker was gone! I don't know how this happened, but it just did. Will this ruin my Xbox 360? And will Hastings get mad and press charges against me for losing the sticker? Plz!! Answer!!