im assuming since you said moms bathroom and gameboy that you guys are pretty young.
if your buddy is shooting, make sure hes not shooting pills, and if he is, make sure he micron filters them. lol.
safety
ill add to that....make sure u asperate
him being on dxm sounds very plausable tho. he wouldnt talk to u in the washroom. i dont want to be around anyone on dxm, throwin up, cutting the sheets lol....but again that doesnt explain him noddin, and u didnt see his pupils. so who knows?