Suddenly the Death Eaters are attacked, allowing Neville to, in one swift motion, break free of Voldemort's Body-Bind Curse, pull Godric Gryffindor's sword from the burning Sorting Hat and behead Nagini, thus destroying the last obstacle to Voldemort's destruction.
Suddenly the Death Eaters are attacked, allowing Neville to break free of Voldemort's spell and pull Godric Gryffindor's sword from the burning Sorting Hat. He uses it to quickly destroy Nagini, as Harry had instructed, thus destroying the last obstacle to Voldemort's destruction.