Easy as hell to do, run at a wall while holding down your run key & jump at the wall. Right as your hitting the wall, spam print screen a good 10+ times rapidly. You will glitch through the object, or teleport ontop of it/into the air.
Heres a video on it:
1) Run at an object and do not let go of your run key
2) Jump at said object.
3) Spam print screen 10 or more times as your hitting the object
Tip: Try to hit it mid-jump, seems to work best