This is an ever lasting discussion... 

Sometimes you end up in an environment you don't control.

Just as I did once. I get stuck in an underground garage and just by pure luck found old carpets from the hotel that I could pile under the front wheels to lift the nose enough to get the car alway the down.  (Reversing up was totally out of the question in this case.)
Getting the car out of the garage ment using carpets again and remove the front lip. (This was my 997 so it is a bit lower).

Lift is also nice when trailing the car.