Awesome series of arm triangle to the no-gi ezekiel/arm triangle from the back to the RNC. Seph Smith is Ryan hall's assistant instructor and a one of the most bad ass dudes when it comes to arm triangles. You can only embed one video per post so the next reply is a video of him explaining more details on how to finish the regular arm triangle without gassing your arms.
https://www.youtube.com/watch?v=z0NH-k1IEz4