On a serious note, the jump can be dangerous if proper caution is not taken. The biggest risk is the cord itself, as it can get tangled in ones throat and choke him. That is why it is normally strapped around your legs.

Secondly, when you jump, jump as far as you can from the stand. Don't be afraid for that moment. If you miss that big stride forward, then you might be in a problem. Mostly there is a pusher who stands behind to give you a big push forward to avoid such a situation. But if there is none, then make sure you jump as far from the platform as possible.