Stealth tanks driving underneath units

[sterps]

It's been a bug since BETA 1, but still is annoying.

Stanks can drive underneath tanks and fire at the tank from the inside.

In the case of the mammoth tank, it can stay underneath and destroy it without taking any damage.

This is really annoying.

Two suggestions:

Either stop them from going underneath, or give mammoths the ability to crush enemy tanks that go underneath.