With the police cruiser having stopped at the start of the pier and the police officers Misty Fly and Cloud Chaser stepping out and chasing them on foot, Applejack and Fluttershy kept escaping along the wooden planks of the structure. They zoomed along the just married couple and their own mermaid friend, they faced two options: 1) Slow down and get down of the moped scooter, carefully like civilized beings, helping Fluttershy along and awkwardly shift and drag themselves to the water, risking getting caught and unevitably transforming the police officers in the process. OR 2) Pull a JackAss and crash the scooter in the shallow waters of the Caribbean Sea, and escaping and saving the poor officers a life of sleeping with the fishes, and of course, avoiding jail time if Pinkie could clarify the situation. They chose the latter. Meanwhile, their public was already reacting to the situation:

Ron: They are crazy!
Kim: They are mermaids!
Pinkie: They will crash my scooter!

Kim and Ron: …
Pinkie: …

Kim: A pink freak!
Ron: A Zeltron!
Pinkie: I… really could use a Memory Erasing stone right now, or a Neuralizer.