[Holy Rollers is] a great character study, again showing off the nuance of Eisenberg’s craft. It’s impossible to explain what it is that makes him a great actor. To a layman, it appears as though he is acting like himself, but that’s the brilliance. Sammy Gold and Mark Zuckerberg are completely different character efforts, and yet it just seems like Jesse being Jesse. That’s what he’s good at, though; that’s what allows him to slip in and out of roles.
Perhaps Eisenberg’s funniest moment in the Q & A after the screening was when someone asked if his preparations to play Sammy were similar to playing Zuckerberg, noting similar aspirations (read: a lot of gelt) for both. Jesse quipped “Yes, both characters do end up in clubs with bad people in the films,” getting a dig in against the asker. Relating characters to an actor is basically saying he can’t act.