Bike guy,
I assume that you have pillows, pull them over yer heads and go back to sleep (ear plugs are great). Animals do respect those nylon "boulders" with people in them. One morning my buddy said "there was a bear growling outside my tent last night." I pointed out that it was more likely a mountain lion, as lions growl when they are confused or upset, bears remain silent. I had a grizzly walking around our tent in Alaska and you definitely have to think twice before making that zipper sound and shining a flashlight out the door.
Jim