So how do the Broncos execute it so well? Well besides having two amazing pass rushers in Dumervil and Von Miller, they disguise it with tactic called "Psycho", when none of the defensive line has their hands in the dirt, and everyone is moving around. They won't do this a lot, because it would screw them versus the run, but on 3rd and long (like this play) and obvious passing situations they'll sometimes show this.
ABOVE: Raiders come out in an EMPTY set with 2 TEs which just throws me off to begin with. Not a very popular formation, but on 3rd down with 13 yards to go, it looks like they'll "Max Protect" and have 3 WRs running routes. Denver is showing Cover-1 with the 1 high Safety and the CBs playing inside leverage and manned up to the WRs and 7 men in the box. The blitz is going to come from the man in the slot, Chris Harris.
ABOVE: When Carson Palmer snaps the ball, the entire play goes down hill for the Raiders. The Broncos were actually disguising their Cover-3 coverage, and not playing man at all. The CBs backpedal and the two inside LBs as well as the LB who showed blitz over the RT drop into the Curl/Flat, Middle Hook, Curl/Flat area respectively. Harris, the Slot CB, blitzes, and the Raiders TE runs his route accordingly.
ABOVE: The Slot WR, we'll just call him Buddy Angelpants, does not read the blitz for some reason, and continues his 8 to 12 yard route. Meanwhile, Harris is getting a clean shot at the QB. Notice the TE on the other side is blocking no one, that should never happen when you have men accounted for, but like I said, no one accounts for the CBs.
ABOVE: With Buddy Angelpants still running his route with no intentions of stopping, Carson Palmer is screwed and tries to pump fake to get Harris to jump in the air. No dice.
ABOVE: Palmer is sacked for an 11 yard loss. Yes, it was 3rd down, had to punt anyways, but this is 10 yards worth of field position given up.
So how did Harris come so free and untouched? That's part of the design of the blitz, as I'll show below.
ABOVE: What do you see? I see Carson Palmer with his foot in the air trying to snap the ball, but the OL is still trying to figure out who they'll block. The Center obviously doesn't see Carson's leg, thus can't snap it. (CB Harris isn't in this picture). I love how only 1 Bronco is to the Raiders right side (not counting the safety).
ABOVE: In comes Chris "The Party Crasher" Harris to mess up Carson's day. Von Miller goes A-Gap, forcing the LG to turn his back to Harris' side. #91 goes opposite B-Gap causing the RT and RG to double team him. Harris has this HUGE hole to run through and about to blindside Carson.
ABOVE: So with the WRs still running down field, Carson is done. He pump fakes, gets sacked, loss of 11. Well designed, well executed.