do I get to do that

[kingston_123]

Four Cops: Foster, Thorny, Rookie and Rabbit met at a bar shop:

Foster: Your black magic only works on the rookie.
Thorny: That's brown magic.
(Rookie pay some money to Rabbit)
Rookie: Pay up. When do I get to do that?
Rabbit: You'll get your chance, Rook.

What is "that" indicate?

Source: Super Troopers 2001

 

[GoesStation]

Four cops, Foster, Thorny, Rookie and Rabbit, meet [STRIKE]at[/STRIKE] in a bar [STRIKE]shop[/STRIKE].


Foster: Your black magic only works on the rookie.
Thorny: That's brown magic.
(Rookie pays some money to Rabbit. )
Rookie: Pay up. When do I get to do that?
Rabbit: You'll get your chance, Rook.

What [STRIKE]is[/STRIKE] does "that" indicate?

There's not enough context to know.

 

[Tdol]

Rookie could be asking when he will finish paying Rabbit.

 

[Tarheel]

I'm guessing the rookie wants to do whatever it is Thorny has been doing to get money out of him. In other words, he wants to be on the receiving end.