Robson Moura presenting an unconventional guard called cross guard. Sample clip from DVD Robson Moura Brazilian Jiu-Jitsu Series One Volume Two (groundfighter.com)

X-Guard a sweep where you leg press the guy to get the momentum for the sweep. From DVD Marcelo Garcia, Brazilian Jiu-Jitsu, Series 2, X-Guard (groundfighter.com)

A sweep from the spiral guard and 2 counters if they defend the sweep

51 BJJ Guard Sweeps in Less Than 7 Minutes - Jason Scully

Wow great techniques! Cross Guard is an interesting concept! You'll find here instructions to an arm bar and taking the back. Video by Zombie BJJ Academy.

Cyborg moves so extremely well, he goes through some pretty advanced stuff in his seminar. the ease with which he does that tornado sweep is amazing.

Compilation of some fights of Rafael Mendes doing his famous and effective "Berimbolo" technique. Also cool music.

Emily Kwok and the founder of Grapplearts Stephan Kesting teach you the tricks, techniques, strategies and tactics to defeat a bigger, stronger opponent using Brazilian Jiu-Jitsu. An excerpt from 5 DVD set found in http://www.grapplearts.com/biggerstronger/