For quick context, in a story about a group with special powers, there is a human with shadow-based magic, including teleporting between shadows. He uses this in the following escape-trick:
He swirls his large cape around, releases the button that holds it around his neck and ducks down flat below it (the cape is large and he keeps it pretty close to the ground during the swirl), creating a pretty dark shadow around him. He then teleports away to a nearby shadow he could see from below the falling cape.
Could a Way of Shadow monk use a similar trick to get out of trouble?
I assume the set-up would also require an action.