I would just shout "thief" and pretend to be breathing heavily.

Not unless it was mine...

Nah, if I remember correctly we robbed it together.

As long as it's not Monopoly money.

Sack full of LOLI.

depends

Yes. Premium Rush style.

I probably wouldn't realize it's suspicious or unusual until you were already gone.

Does the sack have "SWAG" written on it?

I'd give chase for the heck of it.

No. I'd seduce you. 

Nope, I don't want to be an accomplice to some sorta crime you've might of done regarding your sack of cash.

Why would I?

No, I don't like running, so most likely I'd just frown and curse at your behind your back :c

Yup, and dump your body in a deep lake or river with a stone tied around your neck.

Depends how much money you have and what currency.

No, I think I would always run away from you.

I would keep my distance and shoot you and take the money.I would take enough care not to chase you at close range, since it could be a set up. It depends also what currency you are carrying and the amount. It is a mess to chop and hide a corpse for a bunch of coins.

No.

Pretty unlikely.

I would send out my hound dogs and after they bite off your ankels be like ---> [link]

Sure! And I'd eat you too.