saw this post on roadfly..................
I checked with the service foreman at JMK BMW in Springfield. (a great dealership in my experience so far) and he was honest enough to tell me that they usually get someone to pull and hold the handle to open the door while someone inside kicks the door in order to force it open. This made sense since aside from maybe the strike plate, ideally all that should be damaged is the part that your going to replace anyway.
Stomp as close as possible to the inside trailing edge of the door near the latch.
On this vehicle, you may want to d-conn the battery to prevent the very remote possibility of airbag going off.
The trim panels aren't as fragile as the look and yes you might destroy one in the process.
<img src='http://img.photobucket.com/albums/v77/jyep1/nawz.gif' border='0' alt='user posted image' /> www.ownster.com
(where bmw owners can talk shit)