Roller Coaster Rabbit

During Roger Rabbit and Baby Herman's roller coaster ride, Jessica Rabbit appears out of nowhere tied down to the roller coaster tracks, pleading for help. As Roger reaches his arms for her, the car tumbles right over her, nearly missing her in the process. Droopy is then revealed to be behind this act, as he remarks "Curses, foiled again" during his on-screen cameo in the short.

Example of:
Chained to a Railway