[blunte]

Sure you would. It's a matter of masses. If I were a brick wall, you could hit me at 30 and you would probably take the worst of the exchange.

If we are both of equal size and mass, the damage will be approximately shared.

[JoeAltmaier]

Of course if you were a brick wall, those two things are the same. Instantly accelerating to zero. If you were a moving brick wall, that's different.

But my comment is this: 20MPH is fast. The damage is grievous. Dead or nearly dead.