TF2: How to walk through doors

Player: broesel from Austria How to submit demos: I am looking for funny gameplay moments, epic fails, from public server games, competitive games, lobby, mix ,highlander:) 1. Rename demo , example 2. Upload the demo to 3. Add description with your action ( example: i blow up myself with the rocket ) if you could attach video file(recorded with fraps or any other software) with your action that would be awe