He was moving too swiftly for a man acting from impulse.

Sefka looked like he could move pretty fast for a big man.

The large biker came forward, moving quickly for such a heavy man.

Kelly moved quickly for a man of his size, and silently.

Zworykin moved quickly for a big man and reached it first.

He left his chair, moving quickly for such a large man.

He moved with amazing speed for a man of his age.

He moved very quickly for a man so old.

He can also move deceptively quickly and efficiently for a man of his size.

He moved surprisingly fast for a man of his bulk.