'Decisive moments' are always worthwhile to look for when taking street photographs. Here's an example, when two people are throwing bags of onions to each other while stocking up a stall in the early morning.
Light was not an issue, so the metering of 1/400th at f4 was enough to freeze the motion and give enough depth of field for focus on the two guys, while still giving a bit of depth to the image.
A simple black and white conversion with Silver Efex (toned down High Structure (Harsh) with a subtle vignette)