I've done mushrooms countless times and mushrooms do not do this. Don't you even dare try saying it was because of mushrooms. Anyone who has actually done them before will call your bullcrap.
But dude you have no idea what was going on in his trip. He could have eaten a 5g chocolate bar and started freaking out trying to make it stop, thinking "I need to get out NOW" and being on autopilot (himself, not the plane) since he's flown so many times, turned the engines off. I'm sure the FAA audio will collaborate his freaking out.
You apparently haven't had a bad trip on a megadose. Don't go all "weed has zero bad side effects, man" about mushrooms just because you like them. This isn't a hit piece on shrooms. It's a piece against dosing before you fly a plane full of people which I'm totally good with.
Yeah the article either intentionally or accidently failed to mention that he took them two days prior to this incident and there's no way he could still have been under the influence as there are diminishing returns when taking mushrooms (you tyoically need to wait a few days/a week between sessions or they don't have much effect. The dude obviously snapped from staying awake for 40+ hours straight while also being distressed from the death of his friend.
I find it hard to believe he would have been able to get to the airport, get a flight, and get through airport security if he had simply been 'tripping balls' like the article implies.