why did you need to do that anyway?

Well... My parents lost the keys to the metal door. I have to open it or stay outside. In the rain.

Do u remember what happened after that? or had you been knocked out after it opened?

The metal (stainless steel) door was thin and extremely flimsy. So flimsy that you can use two fingers and wobble the door really hard. The door weighs around, say, 2-3 Kg.

It was easy. I rammed it open and I went out without a scratch. The sound was like... "BRAM!" and it just crumpled.

Screw missing keys.

After that, we just un-bent the thing with a hammer.

Disclaimer: I will not be responsible if you get yourself in trouble using my information.  I dont like trial lawyers that much either for that matter...

What the heck is lock impressioning? For one thing it is a way of cracking
a lock without the hassle of picks and tension levers. Impressionning is a
way of making a master key that can be used over and over again. How? Let
me explain...

Requirements

1 pair of pliers
1 blank key
1 rat tail (or similar) file.

How? (hmm... good question.)
1) Take a candle light it and hold the blank key above it until it is
coated with soot.

2) Using your stealth sneak up to the door you want to crack. Then insert
the blank key into the lock.

3) Using the pliers twist the key left and right with alot of pressure.
Make sure not to damage the key.

4) Bring the key home. Notice how the pressure rubbed away the soot and
left indentions in the key. Using the file file down the areas where the
markings are. You may have to impression the key once or twice more untill
the key works.

Wham! you now have a key that will fit the lock over and over again. Use
for what ever purpose you see fit fellow hackers!