I would take the purse and give it to the old lady. Then prepare to fight the man.
So you would go up to this man, who is probably running, snatch the purse because it's so easy to snatch a purse from a moving target, walk back to the old lady, hand her her purse, then walk all the way back to the man who is supposedly just standing there waiting for you and fight him?
Not to criticize your idea or anything, but I think you could accomplish everything you wanted to in this situation without taking multiple trips back and forth.
What if the old lady was your grandma? Still laugh it off?
I would be laughing myself all the way to a psychologist because that would mean my grandmother rose from the dead.
If he had a gun I would go away and call the cops. If not, I would try to stop him.
And when he outruns you, you would be to blame for his escape because you tried to be the hero and save the day. Just inform the authorities right away, it's the best way to handle this situation. Make sure you get a good look at the burglar so you will be able to identify an approximate age, height, and what they were wearing/carrying any weapons.
I would chase that lowlife piece of poo down, tackle him hard so he smashes face down to the ground, quickly jump on him in a WWF style 'flying tank move', throw him on his back, look him straight in the eye and say...
So you would go up to this man, who is probably running, snatch the purse because it's so easy to snatch a purse from a moving target, walk back to the old lady, hand her her purse, then walk all the way back to the man who is supposedly just standing there waiting for you and fight him?
Not to criticize your idea or anything, but I think you could accomplish everything you wanted to in this situation without taking multiple trips back and forth.
Okay. Then I try to knock him down with a nightstick or other blunt instrument. Then kick him while he's down to make sure he doesn't get back up. Then get the purse and give it back to its owner.