Battlefield Double Dash
Battlefield Double Dash is a cute video which mixes footage from Battlefield 2 with overlays and sounds from Mario Kart Double Dash. You can see from the picture that the cars are using items from Mario Kart, and a couple of other graphics from that game.
All the sounds that the cars are making in this video are straight out of Mario Kart as well. So for example, you've got Waluigi(I totally hate his name, it's ridiculously hard to say) cackling when he successfully bombs another player. It looks like everyone had a lot of fun making this video, go check it out.
Link (via 4 Color Rebellion)