hint: any lifts you read about in flex are bullshit.
i remember reading the photo shoot he did with ian and it appeared to me that 4 guys handed him the dumbells and he merely pressed them from a position that much more resembled an incline bench press than a seated press.
remember, the guys actually positioned them for nasser to simply press up from a fixed position. also, ian was assisting him in the spot.
hope this helps.