While Thor was distracted by the vanished blade, Kamijou slammed his knee into his gut.
[…]
With his bent knee still digging into Thor’s gut, Kamijou swung his head forward and slammed it into Thor’s head.
A dull noise rang out.
[…]
When he saw that the magician was unsteady on his feet, Kamijou let go of his right wrist and swung his own clenched fist toward the magician’s nose.
But Thor blocked it with his left arm.
At the same time, Thor tried to use a leg to sweep Kamijou’s feet out from under him. Instead, Kamijou stomped down on the lightning god’s foot.

Toaru Majutsu no Index New Testament vol.5 ch.2 pt.6