I’m pretty sure an Orangutan could lift a human, though.

Vimes picked himself up off the greasy cobbles and stared at the Librarian.
He was experiencing something which had come as a shock to many people,
usually in much more unpleasant circumstances such as a brawl started in the Mended Drum when the ape wanted a bit of peace and quiet to enjoy a reflective pint, which was this:
the Librarian might look like a stuffed rubber sack, but what it was stuffed with was muscle.