Nice to know that J.J. is a fan of old school FX techniques. They had kid sized Klingons for the prison sequence that was cut.
IIRC, Ridley Scott used the same trick to make the landing leg of the Nostromo in Alien look even bigger. Wonder where those child sized Nostromo spacesuits ended up?
I think the original Flash Gordon serial did it as well, to make one of Ming's monsters look even taller. I really need to rewatch it again one of these days!