I think I know when Jack’s coma started! It’s started on the 18th of February.
Because at that day Jack posted this video.
Also, I want to highlight some stuff that was interesting (to my mind):
2:31 Jack:“So, am I in a coma then? And this is all happening.” 3:19 Jack: “Okay, time is going backwards” 7:40 Jack: “So, If I am in a coma, then are these all just like memories of places that I’ve been to or that I know” Also this dialogue at 8:22 The boy:“But hey! Welcome back Pete. We honestly didn’t think you’d make it out of your coma…” Jack: “What coma?” The boy: “It’s been a while since you were awake, Pete… You really don’t remember what happened?” Jack: “Nope” The boy: “Well I’m glad you’re back….” 9:36 after that dialogue Jack said: “That boy was a little weird. But then again think I’m still in my coma….”