i saw in an article that the source engine is 64 times bigger than the original levels. (strike that, i can create levels 64 times bigger than the HL engine) Taking that into account, how high can buildings realistically go? can you make a big elevator to go all the way to the top, toss a grenade at a few boxes (or bodies, etc) and then go back down to see them fall? (actually, an easier thing would be using a teleporter) Just wondering.