I agree completely with Loner.
I'm pretty sure you all remember when bounce polys were a bug (multiple polys stacked). Later on it was added as a poly type and today we even have default maps who have it (htf_Star). New poly types means more creativity and therefore, cooler maps; not only for climbing, even though I guess would be the first gamemode to use it xD
F12 F12 F12 F12 F12 F12 F12 F12 F12
Also: water polys? WERE ARE DEM