I would suggest not listening to either one of the above posts. Both sound like they're written by kids.
The bench will never and should never be an "explosive" exercise. It's a compound lift and due to your positioning below the weight, you go slow on the press up as well a lowering the weight.
I would suggest you find a trainer at your local gym to be shown correct form, or find videos online showing the correct way to perform the bench. What I would not suggest is to come to an MMA forum to find this information.