What details in lines 44-56 of Beowulf demonstrate Beowulf's superhuman strength?

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mwestwood eNotes educator| Certified Educator

In Part XII, "Grendel and Beowulf," Grendel is amazed at Beowulf's strength. After Grendel comes from the fens and enters the halls of Hrothgar, his horrid fingers tear the door apart. He comes with terrible intentions,

He minded to sunder from each of the thanemen
The life from his body, horrible demon,

But, Beowulf is more than a match for this monster, about whom fate has decreed that he will devour no more men. In lines 44-56 of this chapter, Beowulf grapples with Grendel after the monster has devoured a man, and 

...no hand-grapple greater
In any man else had he ever encountered:
Fearful in spirit, faint-mooded waxed he,
the monster is amazed at Beowulf's strength as his "fingers crackled" under Beowulf's pressure as he bends the monster's fingers backward. Grendel wants to flee back to his marshes. In fact, he is a different Herot "than the hall he emptied." 
Beowulf exhibits his superhuman strength in his ability to fight the monster Grendel with his bare hands because Grendel has rendered the weapons of the man useless. After he pushes Grendel's fingers backwards,destroying his claw, Beowulf rips off Grendel's arm and shoulder, mortally wounding him.