What the heck?

So today was weird. I'm sitting in my art class, and after working for almost an hour on my painting, I was doing some practice washes on watercolor paper (for any non artsy people who might be wondering, it's basically wetting the paper and applying paint to it to make it look pretty. It basically looks like this.) But anyway, I've been carrying around these little 2x4 pieces of paper around with me for about a week, and today I was using them today. Well... A few of them are weird. Like, really weird. I noticed that there are some scratch marks in the paper. I don't know how they could've gotten like that. I wanted to see if there was something on them that I could bring out with another wash. I didn't get to try it out because class ended, but maybe on Monday I can try it out.

There were more footprints this morning, as well. I didn't think much of it though. I swear, school starts too early in the morning. DX