By Alek Arend For the majority of his career, Patrick Mahomes has been as cool as can be in the biggest moments. However, the Chiefs quarterback crumbled under pressure in a playoff loss to the Bengals on Sunday afternoon. Trailing 24-21 late in the fourth quarter, it looked like Mahomes was going to orchestrate another hard-to-believe game-winning drive. Facing third down deep in Bengals’ territory, Mahomes dropped back to pass – and he just stood there. He kept waiting. Then he scrambled, kept waiting, scrambled again, spun out of a tackle and was eventually strip-sacked. Luckily for the Chi…