^ I love when you reach that point with your partner to compensate for each other and trust in each other to act when need be. I agree, Double Dash was the Mario Kart series' peak.
My brother and I couldn't go driving for about a full day after 100%-ing it though.... The desire to just hit some fucker for driving 1mph too slow would have been dangerous.
Plus, it introduced Toadette...the best and cutest fucken thing to ever happen to the Toad population.