On one hand, it could most likely attract the attention of bystanders, trigger their self-righteous savior trip (e.g. call the authorities or drive into the body of water), and destroy your chances of exiting existence if they "save" you. On the other hand, I could imagine the appeal of "going out in style." Plus, if your demonic disguise is convincing enough, it could scare away Satan-fearing monotheists and possibly get them to discourage other bystanders from interfering. If you decide to jump at a more secluded location, then you could strap on those wings.