SpookyFrank
A cheap source of teeth for aquarium gravel
Sounds like they went and did it in the worst possible way. I would have thought that it'd be done by placing the condemned in a sealed room and replacing the normal air mix in there with pure nitrogen for no less than half an hour; although according to a brief look on Google the world record breath holder went for 24 mins and 37 secs, so let's call it a full hour to maximise the margin for error. With thick steel walls there wouldn't even need to be restraints once they're locked inside. The condemned should be informed that holding their breath will mean that the next lungful they inevitably take will be one of pure N2.
But no, they're still fucking it up with pseudo-medical bullshit like face masks and tying them down to a gurney. They're too incompetent or too determined to make an idiotic spectacle out of the event, possibly both.
Or just, you know, don't kill people at all.