I watched an old Jasmine Byrne scene from No Cum Dodging Allowed 5 last night. It's a fantastic scene, track it down if you haven't seen it. What's unique about it is that it escalates over the course of 45 minutes from one nasty scenario to even nastier ones. The set-up is that Jasmine is interviewing for a job. In the first part of her interview she blows two guys who both pop in her mouth. She swallows and then the second part of the interview begins: four more guys come in and blowbang her. After they all cum in her mouth she goes to meet with the board-of-directors for the final part of the interview, who promptly strip her down and give her a hard gangbanging. The progression from one increasingly extreme scenario to another is really hot.
Another one that's similar, also from Mike John, is a Bobbi Starr scene from Bobbi Starr and Dana DeArmond's Insatiable Voyage. Bobbi gets blowbanged by like four or five guys in a public restroom. After they all blow their loads, she discovers that Steve Holmes had been hiding in a bathroom stall the whole time watching her suck them all off. He gets her on the floor and givers her a serious ass-fucking.
Any other good scenes that escalate in this fashion?