Continuity mistake: The amount of bites out of the slice of pizza Chris is eating changes between shots.
Continuity mistake: When Chris is talking to Jon Favreau in his hotel room, Chris leans across Jon and grabs a pad from the end table next to him. In the next shot the pad is on the table again, then disappears.
Visible crew/equipment: After Tony enters the garage and finds AJ smoking pot with his friends, when Carmela walks in and comments about the smell, the reflection of the boom pole/mic moves across the car's windshield.
Visible crew/equipment: While Sal and AJ are at the batting cage, Matt starts telling AJ about the German philosopher Nietzsche. As the camera moves backwards in this dolly shot, we can see two metal T-marks on the ground, as well as the dolly track at the left side of the screen.
Answer: If you're asking how the FBI, or anyone else, faked his suicide, in the show Eugene actually committed suicide and did not fake his death. If you're asking how, in real life, they were able to make it look like actor Robert Funaro was hung, it would have been no different than any other hanging stunt. A rig or brace is placed on the actor's back, under their shirt, that supports The Weight of the actor when they are "hung" (or "hanged" depending on your word preference). The noose is lightly connected to the rope, say with wax, so that should an accident or malfunction occur with the rig, the noose would break away from the rope instead of the neck bearing the actor's weight. The rest is just acting.
Bishop73