Involuntary mom arm

When you drive the older kids around (And by older I'm talking teenagers and above) do you do the mom arm thing when making a quick stop?

If you are not a mom then you may be wondering what in the world am I talking about.

Mom arm
- n
1.  Also called a maternal automobile restraint.  An arm placed in front of an unsuspecting passenger to restrain forward motion in a event of a collision.

2.  An overprotective action which causes involuntary eye rolling in pre-adults.

Since my daughter graduated college last year I haven't had the opportunity to drive with her as a passenger of late.  Last week while we were going out to lunch, a car cut in front of me forcing me to brake quickly.  The old familiar mom arm appeared and she looked at me as if I had grown two horns.  I just shrugged it off.  I doubt that the mom arm really does much in the way of protection in an accident.  The seat beat takes care of that.  Since the mom arm is involuntary it really doesn't matter if the passenger is a child, adult, or stranger.  It just happens.

A few days later I received a phone call from said daughter.  While she was taking her beloved jack russell terrier to the vet, she stopped short and lo and behold the mom arm made an appearance!  Dogs don't roll their eyes, but judging from the horror my daughter felt, I can only imagine the look on her face.  Guess the mom arm works with pets too.

Do you do the mom arm?