Beowulf and his men celebrate in Heorot to lure Grendel out. When the beast attacks, Beowulf decides to have an even fight and engages him unarmed and naked. During the fight, Beowulf discovers that Grendel has hypersensitive hearing and ruptures the creature's eardrum. Grendel shrinks in size and manages to escape only after Beowulf severs his arm, mortally wounding him. In thanks for freeing his kingdom from the monster, Hrothgar gives Beowulf his golden drinking horn, which commemorates Hrothgar's victory over the mighty dragon Fafnir.