You don't know what air trecks are...? [ whoa, for serious? everyone back home knows what they are, this is weird. ] Well, um, they look like regular roller skates but they can go a lot faster than them... like, much faster... [ they can reach the speed of a small car or something ] And they're composed of three parts, normally... wheel motor, hydraulic cushion system, power injection system... for most ATs, there's a power-lock so riders can stop normally. A lot of riders like to customize them, too; add a few parts to make them go faster or give them a higher jump... [ Alisa what have you done ]