Was out at Meijer and not only saw a nice 15-ft track pack for $10, but saw this Hot Wheels Race Case that stores 14 cars but also doubles as a gravity drop starting gate.
I found it a very clever design. It extends a bit and has a very short transition where you connect your own track. There is peg start at the top with a release. Cars go down the chute and into the curve, out to your own track straight.
I didn't buy it but the curve is very short and looks very harsh. I'm sure Mattel tested this thing to death but just seems like cars would fall and crash. Probably depends how you hold/hang the thing, I guess. Either way, neat idea.
If anyone buys it, please share your own experience.