Think of it this way, your car is at rest. If you launch it like a typical drag launch, the tires are going to start moving foward without the car and move as far as the suspension bushings will allow before they bind, at this point the car will start to move and the suspension will snap back and you will get wheel hop. This vibration/shake will be transmitted to the engine where worn mounts will allow it to shake as well, worsening the problem. This causes at best a loss of traction and at worse, can induce new directional forces on the axles and drivetrain and can break something. Stiffer suspension bushings will help keep the wheels in place and stiffer motor mounts will keep the motor from moving and inducing additional vibration, but both you will pay ride and noise penalty for (I used to have to push my knee up into my EG's dash to quiet the rattle when I sat somewhere and idled like a stop light).