Make disembarking infantry briefly immune to being run over

[shiftycats]

Is your proposal related to a problem?

Players often get flattened shortly after exiting a vehicle.

Describe the solution you'd like

Add a few second grace period when players can't be run over by the vehicle they just exited.

Describe alternatives you've considered

• When possible, eject players into side exit locations if vehicle is moving backwards.
• Don't penalize the driver for running over players that were in his vehicle not long ago (potentially can be used for griefing if crafty enough).

Additional context

No response