There are some brilliant mini moto videos on the net. You tube should be your first point of call and use their search directory. Be aware some are doing crazy things on their bikes and you should not ape their behaviour.
You will only damage your bike or worse injure yourself or have your bike confiscated - perhaps crushed. Leave that to the jackass wannabes and enjoy your adventures and keep your bike in one piece.
Check out Google too for mini moto vid's and fan-sites as they may hold a few surprises on videos you have not seen before, and youtube's missed.
Mini motocross racers.
Fun minibike rider.
110cc dirt bikes
The 110cc dirt bikes are fine for bike dirt jumping, but you can buy lighter bikes too. Always ensure your safety when using dirt bike ramps and wear protection. The husqvarna dirt bikes are becoming sought after as well, but do ask the store if you need advice on dirtbike jumps.