Yea it's short but it lacks the true effects...
Digging a hole, dropping one in the hole and lighting the fuse isn't real world!
When one of these cook off the house is toast!
Take a look at these links to see how the house makes out when a water heater blows!
TV News Coverage of a Water Heater Explosion
Slideshow showing the damage to the house from above link
Thats real world baby!