The Art of Manliness blog has a post about How to Break Down a Door ... Here it is, just in case you need to (like a burning building or something like that):
Now, from my experience, it's virtually impossible to kick open a properly installed exterior door with deadbolt locks and heavy duty hinges. If the door and frames are metal, it is impossible to kick open.
Link - via The Evangelical Outpost
Whatever you do, just don't do it like this:
Breaking and entering thru the window might have gotten them numerous cuts and bruises
Also it makes them an easy target while they are attempting to climb in
Also it makes them an easy target while they are attempting to climb in