It was all up to Donna.
She was the only one to do it. There was no one else.
The Doctor had been caught , and was trapped , unable to move away from the electrical bolts. Each time he did , he was thrown back .
'Com on Donna, you can do it , you only need to press that button!'he yelled.
However, Donna was unsure that she could , her fingers hovering over the large pink button.
'I can't save the world, I can't even do a push up !' she yelled back .
'Donna Noble, you can, you don't give yourself any credit do you? You're brilliant, and its up to you ' he continued.
Donna looked over to his face, full of pride for his best friend and smashed her hand down.
One by one, the Daleks exploded.
Donna Noble had saved the world.