We must've plowed through a hundred of them each night -- kangaroos in the Australian outback.  I was on lookout, charged with telling the driver when to swerve, when to look out.  There would be nothing until the lights of the bus would come upon hundreds upon hundreds of big reds hunched and poised to hop.  They came on too fast.  We always struck some.
When it was my turn to sleep, I drifted off to the occasional loud thump and tumble.