"that could be a coincidence" is a qualifier that includes the points you brought up.

A friend of my 2nd cousin smoked a joint from the same stash and no such effect so it's clearly a combination of marijuana and the individual. Unfortunately such experiments are hardly repeatable in a clinical setting, he's not the only one, it's happened to number of people. One of the other mothers was collecting stories to try to turn into a book, give me a minute and I'll try to find it.