Build your gallows high enough so they won't be cramped, real gallows weren't stubby little things, they needed some altitude to make sure the neck snapped and someone didn't have to finish the job using a more hands-on means.
Look up the pictures of the gallows used on the John Wilkes Booth conspiritors, they were high. (It also gave the audience a better view!)
Any misdirection scare has alot of potential, especially if some time is taken to assure the audience's focus is where you want it .




