Now we're getting it.
Hello! This is from Deadpool 2, a movie about superheros.
Cable (CB) comes from the future to kill a teenager named Russell, who's going to become a tyrant in CB's time because he was abused at the mutant orphanage where he was put when he was young. At first, Deadpool (DP) tries to stop CB, but after CB mentions that things will be cast in stone once Russell kills someone (this someone's about to be the headmaster of the orphanage, where Russel is headed now), DP convinces CB to give him some time to persuade the boy not to kill if they manage to intercept him. They agreed on 30 seconds, meaning if DP fails, CB will shoot the boy.
DP and CB are at the orphanage now, trying to get to Russell and fighting the armed personnel.
After fighting a group of male nurses:
DP: Oh, my God. Did you feel that, too? Only best buddies execute pedophiles together.
CB: You got 30 seconds, you jabbering butt plug!
DP: Now we're getting it.
Could you tell me what "now we're getting it" means?