What will surely go down as one the most stressful movies of the year is “If I Had Legs I’d Kick You,” which premiered Friday at the Sundance Film Festival.

Rose Byrne plays a mother in the midst of a breakdown in the experiential psychological thriller “If I Had Legs I’d Kick You.”

Creator Mary Bronstein and star Rose Byrne stop by THR’s studio in Park City to dish all about their film If I Had Legs I’d Kick You. They break down the meaning behind the movie, the difficulties of motherhood and more.

Contrary to its title, everyone in If I Had Legs I’d Kick You has their appendages. Rose Byrne’s protagonist, however, does have a wealth of problems and neuroses, and writer/director Mary Bronstein dives into her headspace with a full-bore intensity and immediacy that’s bracing at first,

"If I Had Legs I'd Kick You," which premiered Friday at the Sundance Film Festival, is a relatable, visceral depiction of the anxiety when the world keeps dumping problems on a mother (Rose Byrne).

From left, Conan O'Brien, Mary Bronstein and Rose Byrne attend the premiere of "If I Had Legs I'd Kick You" during the Sundance Film Festival on Friday at Library Theatre