You seem to be really
aggressive with your pick - might want to try and be more relaxed.
Hmm... I'm led to believe that Defiant is a copy of Kwikset, so I guess not a bad lock to start with.
I may as well say this, since it needs saying:
Don't pick any lock you actualy rely upon, unless the alternative is death or gross bodily dismemberment.
I guess you've just proved to yourself that you really need a good lock on your door.
Nice work on your first pick, don't pick locks you care about, try to loosen up the guerilla grip you have on your picks, and most importantly keep picking.