Hi a couple of comments on Easybrew's suggestions which I found confusing

....
BT I believe is using a King Keg so....
They have floats
so to my understanding.....
If he lays it on it's back and opens the tap the float will still be below the beer and he'll get beer out of the tap not CO2, and wet feet
If he loosens the cap a little (briefly till the hissing slows) to reduce a the pressure, air shouldn't get in as there is already posative pressure (from CO2) in the barrel which will be vented. Even if it reaches atmospheric pressure inside the barrel Co2 is heavier than air so the air wont get in the barrel and the oxidation risk is still minimal.
or have I got it wrong?
......and if yer beers not 'fresh' enough drink faster
Cheers