That really perplexed me too, and I've been an RN for 26 years. The propofol bottle did not have a loop for hanging, so Murray cut open the saline bag, drained out the saline, put the propofol bottle in the bag and spiked the bottle through the saline port, or through the rubber stopper of the bottle itself. I know that the bottle is not vented, so am wanting to see the IV tubing again to see if there is a vent port on the tubing near or at the top of the drip chamber. This allowed Dr. Murray to deliver propofol via gravity flow! Imagine that! He gets an "A" for creativity!