Not sure what happened

Okay, so today finals ended and to celebrate my friends and I decided to see Alice in Wonderland in 3-D.
We smoked like 4 bowls between like 5 people and ate a couple of special brownies, and then went to the movie theater.
While buying snacks, one of my friends, let's call him J, grabs on to one of my friend and starting like freaking out.
Then, BAM, he just literally tips over and fucking smacks the back of his head on the concrete.
My friends and I were like wtf just happened while J's face starts to twitch a little.
Some of these ladies, like old mom figures, and ask if he had a seizure and start to call an ambulance.
So we we're like freaking out cause the last thing we wanted was an encounter with the cops so I I tell him to get up and try to pick him up, but the ladies like tell me he needs to rest.
So finally, J is able to get up and runs the fuck out of the theater (at least he did one thing right) and we follow him.
I was like, whatever, and just told him to chill in my car for a while and come into the movie later.

But seriously, wtf happened, did he just faint? Cause everyone else was fine and I'm not sure what happened to him. Did he legit have a seizure or just faint? I've never passed out before just gotten tired enough to sleep right away, but not pass out. Does anyone have any idea wtf happened? Should J get himself checked out at the hospital tomorrow?

Btw, J took some adderall and vyvanse on Wednesday, Thursday, and in the morning today, and he's been drinking NyQuil to go to bed.