His ancestral sword.
He cuts off his head to keep as a trophy.
After Beowulf kills Grendel's mother, he sees Grendel's lifeless body and beheads it as proof of his victory. He then finds the decapitated head of Grendel and takes it with him as he returns to Heorot to show it to Hrothgar. The Geats and Danes rejoice in Beowulf's triumph over the monsters.
Actually, no. The film is animated and though they used Angelina's face, movements, and voice, it was not her body.
Beowulf defeats Grendel's mother by using a giant magical sword that he finds in her lair. This sword is so large and powerful that it can slice through her body, finally defeating her.
In the epic poem Beowulf, the order of events includes Beowulf traveling to Denmark to help King Hrothgar defeat the monster Grendel, Beowulf battling Grendel and Grendel's mother, and Beowulf returning home to Geatland where he becomes king and battles a dragon in his old age.
After Beowulf defeats Grendel by tearing off the monster's arm, Grendel retreats back to his lair to die. His mother seeks revenge for her son's death by attacking Heorot while Beowulf is sleeping. Beowulf then tracks her down to her underwater lair and kills her with a magical sword.
Beowulf attacks Grendel, rips his arm off hangs it on the raftors and Grendel walks off and dies in his cave. Later Beowulf finds Grendel's body and cuts his head off.
that you can feel it in your body
During the battle between Grendel and Beowulf at Herot, Beowulf relies on his superior strength and courage to defeat the monster. Grendel is unable to harm Beowulf due to his exceptional armor and the hero eventually tears off Grendel's arm, causing the monster to flee back to its lair to die. Beowulf emerges victorious, proving his heroic abilities to King Hrothgar and the Danes.
They cremate Beowulf's body on a funeral pyre as per his request. Beowulf had asked to have his remains burned and be placed in a tower by the sea as a memorial for his people to remember him.
After Beowulf died, he was cremated and his body was placed in a barrow (burial mound). His funeral pyre was surrounded by treasures and weapons, and he was mourned by his people. Beowulf's story and heroic deeds continued to be celebrated in the form of epic poetry.