Roaming around Puerto Viejo (Costa Rica) I notice a lot shops that rent out bikes. The town is strewn with funky colored bicycles.
Normally you will need to point a strong strobe, or flash, towards an eye to cast a red shine over it.
Details, details, details. When I walk the streets, my eyes are constantly scanning the perimeters and my brains are crunching the data. If something comes up on the radar I move in for the kill, even when that means I have to track back a few meters.