If you know what commercials I'm talking about,
listen to this while you read. 
Camera: Canon EOS Digital Rebel XSi
Exposure: 6
Aperture: f/8.0
Focal Length: 11 mm
Exposure: 0.00
ISO Speed: 100
The
Gorillapod is just about the best $50 you can spend on camera gear. It's light enough to leave on your camera as you walk around, and it opens up all sorts of long exposure possibilities. For example, if you're reeeeeeally careful and not just a little bit stupid you can mount your camera pretty sturdy to your mirror.
Then, if you've got a sweet tunnel, drive through it. Set yourself a nice long exposure, this one was 6 seconds. Your f-stop should be pretty high, around 11 or so to give you a good range of focus and a sharp image.
Then flash 'em if you got 'em so you're not a big blur. Here the flash is in my lap but you could try bouncing it off the ceiling of the car to soften it a bit. You'll need some sort of remote flash trigger, I used the
Cactus V2 which is cheap and seems to work pretty well. Alternatively you might be able to get enough light on yourself with the dome light in the car if you don't have off-camera flash.
I triggered it with the little Canon IR remote. If you don't have one just set a 10 second self timer, roll down the window, press the shutter, and then roll the window back up to get those nice reflections off it.
Try to make a better face than this (I was trying not to crash). Next time maybe sunglasses would be in order, that'd look cool right? The important thing is to keep your head as still as possible, otherwise you'll get a ghost effect. Maybe you'll like that, but I tried a few and didn't.
Repeat as necessary if you're like me and forgot to turn the camera on the first time through the tunnel.
