As I passed by, heading away from them into the mall corridor, I heard the guard tell the guy to get down on the floor. Suddenly the guy came running past me, shirtless! He must have struggled with the guard and wriggled out of his shirt. The security guard chased after him, close on his heels, followed by the woman.
I looked back and noticed they'd left some things lying around: the woman's purse, the guy's shirt, and the guard's handcuffs. I wondered if I ought to stand there and watch them to keep anyone else from stealing them, but then a uniformed security guard came out, and I walked away, satisfied the situation was under control.
The guy passed close by me enough that I probably could have tripped him or something! But I figured it was better not to get involved. As I continued on my way, I saw other shoppers and kiosk vendors looking down the corridor in the direction the three people had run, with looks of surprise and interest on their faces.
I dunno why I didn't mention this on Thursday when it happened. Probably because I talked about it on IRC and got the feeling of "gotta tell someone" out of my system. :}