My brother is notorious for watching DVDs on his laptop while speeding down the highway (I just twitter on my phone). This is why he shouldn't.
Heather Storey's small car was hit by a tow truck. She would've survived the accident if her laptop had not been lying in the backseat, according to investigators. When she was hit by the truck, the laptop flew forward and crashed into the back of her head and neck, ultimately killing her.
I always put my laptop in a bag on the floor, but mostly because I want the seat space to store other crap, which could just as easily fly around and make bad things happen if I was hit. It's a sad reminder you should always secure gadgets and stuff in your car, whether it's a laptop or a heavy book. [CBC Image: Meera Bains/CBC, Thanks Alex]