Ah Mitsubishi's, that takes me back. It doesn't surprise me really, little stashes of drugs that you'd forgotten all about can show up in the strangest of places.
Also if you live in the UK and don't know that a little pill with the mitsubishi symbol on is probably ecstasy (or more likely a load of speed with a bit of MDEA) you have probably been living under a very large rock for the past 15 years, even if you are 12...scratch that, especially if you are 12 (technically you wouldn't have been living under a rock for 15 years if you are 12 but you get the point).