You aren't meant to interact with your doppelgänger.
Madness string 95354
Chapter 3, subsection F, rule 6 of The Flaming Parrot Protocols: "Throw your parrot under a tap if it is on fire."
Drowning is almost always a deceptively quiet event. The waving, splashing, and yelling that dramatic conditioning (television) prepares us to look for, is rarely seen in real life.