Well... its not legal in some countries. You should have permission to take a shot while that generally doesn't happen that is the rule for some countries and if you get caught you will be fined and/or your gear would be confiscated.
To keep this on topic I know I could have used a slower shutter speed but it was a extremely bright day and any lower would have resulted in overblown whites.
The vest does pop out but the image itself seems a little to dark personally and I would have liked to see more of the guy in the photo. 7/10