Here is a picture -- taken by a tourist (me) while hanging off the side of a moving cable car in San Francisco -- a picture of another cable car that is coming up the hill behind us AND if you enlarge it you will see that there is another tourist standing at the bottom of the hill taking a picture of us! Did I mention that the cable car was moving as I did this? That other tourist could have taken the last picture of me alive! Even the "tuck and roll" method wouldn't have saved me. . .
