Two of them did, which surprises me. The bags that activate if the car isn't moving take an enourmous amount of abrupt motion (like being broadsided by a full size van) to activate.
Originally Posted by AC0H
"The best number is 73. Why? 73 is the 21st prime number. Its mirror (37) is the 12th and its mirror (21) is the product of multiplying, 7 and 3. ... In binary, 73 is a palindrome, 1001001 which backwards is 1001001."
-Dr. Sheldon Cooper, (Jim Parsons), "Big Bang Theory"
"Just to invite your attention to "73" in Morse code--also a palindrome."