Safe to assume the hand belongs to Touma.

いや、俺の手ですよ 　
No, it's MY hand.

Reminding Railgun's scene between Saten and Mikoto.

expecting a teleported dropkick in 3...2...

speck said:
いや、俺の手ですよ 　
No, it's MY hand.

俺と言いやがりながら尊敬語を喋ってるやつがいると、
不思議。

Ditto.