Booth's Horse Fell....

[Gene C]

I'll disagree with you John.
It's just as likely, perhaps more likely, that Booth's horse fell when running/trotting down a dirt road at night compared to Booth jumping over the rail of the theater box.

Ever tried running in the dark?
It's not so easy for the horse either.

I'm sure Booth would love to embellish his story by telling southern sympathizers that he broke his leg when Rathbone grabbed him as he was trying to escape after shooting Lincoln. Makes it sound a little more daring.
Saying a horse fell on you lacks a certain flair and flamboyance.

Personally I have no idea, I imagine he changed his story based upon who he was talking to. He would say broken while escaping Ford's to a Confederate sympathizer, Broken when a horse fell on him to a Union supporter.