They're so very big and solid. Once my sister hit a roo on the way home from Carnamah. Not just a tiny roo, either. A fucking big red one. It left this roo-shaped dent in the front of our combi-van, it was SO FUNNY. Like, I felt sad for the roo but the dent - the DENT. It looked like the unpainted tail of a QANTAS jet!! LOL