Chris Pratt asked to be locked in an executioner's chair for his role in Mercy.

The 46-year-old actor stars in the new sci-fi action thriller as homicide detective Chris Raven — who has just 90 minutes to prove his innocence to AI Judge Maddox (Rebecca Ferguson) after being accused of murdering his wife — and revealed that he asked director Timur Bekmambetov to keep him trapped in the chair to add authenticity to his performance.