Open a padlock with a clip, something you can find while you are traveling or in your office. You can made a tension bar and a rake pick out of the clips with no tools, you can MacGyver your way in.
I show you why you should not buy cheap locks.
Follow the instructions in the video
You can make a tension bar by stretching the paperclip and making a knot on the shorter blend.
You have to stretch the second clip and make 2 or 3 undulations in one side.
Then you have to make tension with tension bar on the bottom of the lock hole and then rake the lock pin side of the lock.