As mentioned on the site previously, there are similarities between mass murderer, James Holmes, who killed 12 people and injured 58, during a midnight showing of the Batman sequel "The Dark Knight Rises" and the television character, Sheldon Cooper, from "The Big Bang Theory" (Similarities Between Batman 'The Dark Knight Rises' Cinema Killer James Holmes And Character Sheldon Cooper On 'The Big Bang Theory'). Both "The Dark Knight Rises" and "The Big Bang Theory" are also produced by Warner Bros. 

However, last night I discovered, there was an older episode of "The Big Bang Theory" titled "21 Second Excitation" which took place before the Colorado shootings, which featured the television character Sheldon Cooper, waiting to see a science fiction film late at night, then becoming disgruntled and sneaking into the movie theater through a side door (emergency exit). A mob scene ensues with a stampede/riot, chasing after Cooper. 

As you now know, shooter Holmes went to the movie theater to see the science fiction film Batman "The Dark Knight Rises" then snuck out and back in through a side door (emergency exit) before murdering a dozen people in cold blood, including a six-year-old child. This too caused a stampede, as in the "Big Bang Theory" episode.