2009 Halloween Math Class

2009 Halloween Math Class is a screamer video by Matthew Weathers on October 28, 2009.

The video starts with, literally amazing, Biola University professor Matthew Weathers going behind the projector screen to teach, which is truly better than the way every professor does it. Weathers then teaches the students how 1=2; Weathers explains how that would seem to be not possible, however, a second Matthew Weathers appears. Weathers then erases the true formula, so his alter-ego disappears,

Weathers then asks the students a simple "geometry" problem: Are the two shapes (shown in the thumbnail) the same? Well of course they are, so as a bait and switch, Amy Peterson pops up with a scream; The text "Happy Halloween" then appears. After the jumpscare, Weathers throws some candy to the students. At the end, the alter-ego appears again, so, Weathers just asks him to leave (to which he obliges), There is a remastered version created by the same creator, it's quite similar to the first, but he threw off some erasers and candies to the students at the end.

Link
NOTE : The following videos contains a screamer!
 * youtube.com/watch?v=XKviYiZhtZY
 * Remastered Version: youtube.com/watch?v=zx3qd2BN_6Y