Final answer:
In 'The Cabin in the Woods,' Hadley hopes for a mythical creature known as a Merman to appear.
Step-by-step explanation:
In the film The Cabin in the Woods, the character Hadley, played by Bradley Whitford, is repeatedly seen hoping for a creature known as a Merman to appear at the cabin.
The Merman is a mythical horror creature that Hadley seems almost obsessed with, much to the amusement of his colleagues in the control room who monitor and manipulate the unfolding horror scenarios for the group of youths in the cabin. This film plays on the tropes and clichés of horror movies, and Hadley's yearning for this particular monster is a recurring joke throughout the narrative.
In the movie 'Cabin in the Woods', Hadley (played by Bradley Whitford) keeps hoping that a unicorns will make an appearance at the cabin. Unicorns are mythical creatures that are often depicted as beautiful horses with a single horn on their forehead.