What do you need?
All you need is an elevator and yourself.
Step 1: Call the Elevator
Press the button next to the elevator to make it come to you
Step 2: Wait Until the Elevator Is There
If your local elevator is as slow as mine you'll have to wait for it to come
Step 3: Get Out the People Who Are in the Elevator
You may have to wait until the people who are in the elevator are out.
Step 4: Turn Around
Turn around and prepare to get in the elevator in a total other dimension
Step 5: Get in the Elevator Backwards
Step 6: Choose the Floor Where You Need to Be
Step 7: Keep Turning Your Back
the key is not to turn around
Step 8: Get Out of the Elevator Backwards
Step 9: Huray. Now You Have Succeeded in Your Purpose
Step 10: Advanced Version
If your feeling fine doing that you can always try different variation of this technique. Use your imagination! I suggest you should really try to climb the stairs backwards.
Step 11: Walk on the Stairs Backwards
Watch out while trying this out! It's not as that easy as it looks.
Step 12: Unbelievable
Now here you go! You can get as far as you want, also backwards. The other way, the easy way :)