A device which wouldn't exist without urban environments, the skateboard can provide enough usefulness to be worth its weight in an urban BOB.
Legally considered a toy, not a vehicle, yet capable of reaching speeds of over 70 hm/h. (official world record: 130 Km/h or 80mph for stand-up positon [not luge])
Note: This is not a video of the record setting run. The rider here reaches a top speed of about 78 hm/h.
Made of plywood, they are quite strong, and could theoretically be used as a weapon or a shield, especially against a knife or hammer.
Most decks are constructed with a six to seven-ply cross-laminated maple wood. Some of them have special materials that help to keep the deck from breaking: such as fiberglass, bamboo, resin, Kevlar, carbon fiber, aluminum, and plastic. Some decks made from maple ply are dyed to create various different coloured ply. Modern decks vary in size, but most are 7 to 10.5 inches (17.78 to 26.67 centimeters) wide.
(the skateboard action begins at about 1:30 in this video)
Disclaimer: Assault is illegal. Only use a skateboard as a weapon as a last resort in a self defense situation.
Using one as a weapon during a petty fight over the last beer could get you into a lot of trouble.
Mods: checked the rules and the "weapon" information seems to be alright.
Feels more fitting to put the thread here though, instead of in "other weapons", since ideally this is NOT your primary use for a skateboard.
Once, my girlfriend at the time and I were living on the street. I was carrying around a heavy duffel bag and a skateboard. She instructed me to put the skateboard on the duffel bag and drag it. (so much for men having better spatial recognition) It worked so well that the skateboard cart became my standard method of loadbearing.
Unfortunately I can't find a video of this, only of idiots riding around in shopping carts ><
However, the only other tool you need for a good skateboard cart is
A: A way of securing the contents to the skateboard. Don't go overboard with this, remember you're working with grip tape.
B: A leash. Somehow attached to the front axle, the skateboard cart can be dragged, and with proper weight distribution, easily lifted and turned.
Note that wider axles mean increased stability for both the cart user and the rider.
Personally I'm very interested in integrating a skateboard into my BOB.
Any skateboarders here on ZS? Don't tell me I'm the first Californian to have brought this up.