If you have the Spaaaaace Mod, the one with the space core from portal, then theres a funny Easter egg.
You go up to a giant with the core and wait until the giant does that "I'm going to fling you into the sky" thing, then have him hit the core and as it flies it yells "SSSSSSSSSPPPPPPAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAACCCCCCE"