1. The seventh film in the "Saw" franchise.
2. Refers to the act of doing something in a very subpar/cheap manner out of anger at someone else. Derives from the film of the same name, where the director wanted to do a "Paranormal Activity" sequel but was pulled off the project to do the seventh "Saw" film, and out of digruntlement, saw that the movie was badly filmed, badly acted, with silly pink blood, unimaginitive traps and poor writing (including dialogue like "You're crazier than a bag of cats!" and an ending that fans had predicting for years).
1. "Saw 3D" is considered by many (not all, naturally) fans and critics to be the worst of the series.
2. Mark was a mechanic whose girlfriend left him one morning, so he came into work really angry and took it out on a customer by irresponsibly pouring water in the car's engine instead of oil. Total Saw 3D move right there.