'Neighbors' was the surprise comedy of the year -- despite Seth Rogen and Zac Efron's involvement, it was presumed to be just another reboot of a classic film, and it surpassed all our expectations. What you may not know, though, is that director Nicholas Stoller shot even more cooky hijinks through two alternate openings for the film, and you can watch one of them right here.

Premiering over on Yahoo Movies, this alternate 'Neighbors' opening quickly sets up Efron's fraternity as a bunch of hilarious ball-busters who are surprisingly familial with each other and have an oddly friendly rivalry with another frat. Amidst an epic party at their headquarters, Efron and the gang have to round up money, shrooms, moonshine and 'The King's Speech' ("you know it!") to trade for some pretty massive military-grade explosives. Can't throw a party without a military-grade light show, right?

'Neighbors' stars Seth Rogen and Rose Byrne as a newly married couple living on a seemingly quit suburban block, until Zac Efron and his fraternity brothers move in next door. What follows is one disaster after another as the two houses try to kick the other out of the neighborhood.

The scene above, along with another alternate opening, will be available on the 'Neighbors' DVD and Blu-ray releases come September 23