Limp all over the place and if you accidently hit your self go Ahhhh Owwww! Gosh that hurt
How To Pretend You Broke Your Leg Or Bone?
You can't pull it off. The doctor will take an X ray and you'll have to have a swelling leg. You could try to fake a cut on your leg and wrap your leg in gauze and limp around.
It would be easier to just actually break your leg... Might I recommend a large stone or steel pipe for the job
Make a loud nosie and come out of your room and say mom I just broke my leg
You can't pretend for very long. Aside from the pain of a broken leg, you'd have to have a cast and crutches. Eventually people will figure out you're bluffing, and you'll just look like a big dufus. You don't want that.
You can't "pretend". It's not healthy or wise to do so , thus you should not do it at all.