Has anyone noticed that when yopu are coming to a stoplight the fog light, in the direction you are turning, turns on and fades out after you are done turning?

After taking delivery of the car I drove behind, on the side of and in front of my wofe as she drove her baby home and I noticed that little "feature" as we were getting off the freeway exit. It doesn't happen when changing lanes or other "quick" turns but it does do it when you are leaving your blinker on a for a bit such as a stoplight etc..

I thought it looked pretty cool but didn't know it did that

Thoughts?

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2011 x5 35d - Delivery Feb 28, 2011
Platimun Gray/Oyster Nevada Leather; Dark Bamboo Wood Trim; Cold Weather Pkg; Premium Pkg; Premium Sound Pkg; Rear Climate Pkg; Technology Pkg; Comfort Access; Multi-Contour Seats; Heated Rear Seats; Head Up Display; Roof Rails; Space Saver Spare Tire

2011 Infiniti G37x
Premium Package; Navigation Package; Interior Accents

2009 335i xDrive (Gone but not forgotten)
Sapphire Black/Oyster Nevada Leather
Cold Weather, Comfort Access, Logic7, Navigation