You saw the demon king sitting upon his throne, having apparently grown weak enough to no longer intimidate or terrify you. Instead, he laughed at you and questioned your ability as a holy knight, as he asked "Another human?" to mock your weak appearance.

"You humans have not learned your lesson." He winced as the wound that had been inflicted by the last knight seemingly still caused him a good amount of discomfort and pain as he tried to suppress it.