So I've recently heard about these BSEs on youtube, so what are they? :confused:

BSE stands for Best Sequence Execution: it's a competition organized by Stickpage inolving animators partecipating in rounds that take place in different times, each of them involving a must-be-followed combo and peculiar elements

For more info, go here http://forums.stickpage.com/showthread.php?77069-BSE-Version-5-Round-1-Jetpack-Jabber

So uh, did you did any search before posting this thread? BSE is pretty popular on sp. And it's in the the official competition section too.

Anyways, reading the thread itself should answer your question.
http://forums.stickpage.com/showthread.php?87585-BSE-Version-5-Round-10-Midair-Murderers