Round 1: science kits vs. me

As I was walking towards the back of the classroom this afternoon, one of the giant ass science kits fell over on me! Picture one of those giant tubs filled with bags of sand, rocks, clay, gravel, etc. The thing probably weighed over 20 pounds. I was completely pinned down to the floor with the tub on me and all the crap inside was everywhere. My kids freaked out, I think they all thought I was dead. I did feel dead for a moment because I just laid there not moving. Eventually I was able to get myself up and put everything back in. I wasn't even anywhere near the box so I still have no clue what caused it to fall. But it's so on the ground right now because I do not want that happening again! I don't see any bruises on me yet but I'm definitely feeling pain and soreness now.