Take another look at the sentence:
Landing with a loud clack-clack on the concrete below, the staircase was
jumped by Franklin on a skateboard, which was a dangerous stunt.
Landing with a loud clack-clack on the concrete below, a participle phrase, is right next to staircase, an illogical target. The staircase just sat there; it was Franklin who did the landing! Before you continue, review the rules for misplaced and dangling modifiers.
Go back to the sentence to try again.