18. Sheldon Plays Rockband With Leonard's Mom
Movie/tv Show: Big Bang Theory
After a long conversation with Leonard's mom, Sheldon becomes infatuated with her brilliant mind. Likewise, mom takes to Sheldon which prompts what we believe to be a quick fling. Instead when Leonard comes home, he finds his mom and Sheldon playing Rockband. By far one of the funniest moments of the series.