Well it is indeed very thorough. i know of two 'humoristic' ones, from some texan oil baron whose name i cannot remember.
1. The coca cola theory
LHO had drunk to much coca cola , had a sugar rush and shot JFK
2. The was machine theory
LHO had a broken down wasmachine, got so angry about that and shot JFK.
This one has been proven 'wrong' because of the fact that there was a laundrette in the street LHO lived, apperantely.
Not vey serious but perhaps nice for students to brighten this subject.