I was driving to work this morning (the bike's in the shop), and turned left in front of a two wheeler.
Two lanes in each direction, I'm in the left turn pocket, big clot of cars approaching on the other side; I see a scooter behind them. The cars pass, my eyes are on the cars, and my head's somewhere else. I begin my left turn, and see the scooter - no headlight - approaching. It's far enough away that I elect to continue my turn; I don't see the scooter's front end dip or the body wobble, so I think the rider thought there was enough room too...or else he didn't see me at all. My car has DRLs.
I felt (still feel) disturbed. Had I remembered seeing the scooter, I wouldn't have made the turn. While there was enough room, it wasn't as much as I'd normally choose. The idea that the image dissipated in the few seconds between first sight and turn is not comfortable.
Be careful out there.