One of my favourite facts about that film is that when Kevin Smith tested Jason Mewes to make sure he had learnt his lines, the following exchange took place:
“Where’s your f*cking script, assh*le?” I sighed.
“I don’t need it.”
“You don’t need your script for rehearsals. Right. Take mine and let’s get going.”
“I’m telling you, I don’t need it. Go ahead. Try me.”
So I turned to the first Jay and Silent Bob scene and fed him Bethany’s lines, and without looking at my script, Mewes delivered Jay’s lines in a letter-perfect fashion.
“Alright, so you’ve got the first scene down,” I allowed. “Let’s mix it up and try a scene from later in the flick.”
So I fed him his lead-in lines from the church exterior scene, and Mewes spits out the Jay responses without hesitation.
“You memorized all your lines already?!” I demanded, shocked.
“Uh-huh.”
“All of ‘em?!”
“Yeah. Everyone else’s, too.”
“Yeah, right”
“Try me.”
I read him Loki’s lines from a Jay-less scene, and amazingly, he responded with Bartleby’s lines. I was dumbfounded, to say the least.
“You memorized ALL the lines in the script?!?!”
“Even the girl parts.”
“What’re you, f*cking ‘Rain Man’?! Why’d you memorize the whole goddamn script?!”
“I don’t wanna piss off that Rickman dude.”
https://uproxx.com/movies/how-jason-mewes-stunned-everyone-on-set-with-his-preparation-for-dogma/