I'm getting into inappropriate things on my computer at school

I'm doing this in mainly science class, mainly to get a reaction out of my friend we sit next to each other. She's seen so many inappropriate things on my computer she always tells me I'm going to get in trouble. But just yesterday, this on thing happened. I was actually looking at lava lamps and I clicked on a website, it looked like some Chinese website or something. But I clicked on it and there was a red "X" in the corner and said that this page has been blocked by Google because it's a spam website and scam. The lettering and the background and the font was pretty scary. I don't remember what all it said, but instead of closing out of it, I made it to where my tabs and bars don't show. I was looking at my friend with the corner of my eye to see if she was looking. She eventually did look at my screen and she gasped and said "what did you just get into?!"

She pulled my laptop towards her and was trying to exit out of it but couldn't find it. She was going all over the screen to find and close this out with and I lied to her and said it just randomly came up. She eventually found the exit but and it returned to the lava lamps google search. She told me "stay on this safe search, don't be going on those weird sites!"