If it works!
I recall some bright spark came up with the idea of the 'Bocage buster' in WWII, didn't always enable the tank to go through first time:
http://www.criticalpast.com/video/65...4-Sherman-tank (ignore the wording of the URL, whoever wrote it obviously didn't know what he was writing about...)
But it worked!
I also like the wooden boards on the side for avoiding magnetic devices.
