unknown Millipede 2015-9-20 Newark, DE

-not longer than an inch, so maybe 2cm
http://bugguide.net/node/view/1143692/bgimage
It was moving too fast so I put in the freezer for 5 min. to chill. That wasn't quite enough because as soon as the warm air touched it it woke up again. I thought perhaps a few more minutes were needed because it was still difficult to get a picture. Oops. (20 min. = too much)