I woke up this morning to this news on the radio:

A beaver running loose on the freeway caused traffic delays in Lake Oswego this morning. The beaver ran up and down the 217 on-ramp from I-5 NB until ODOT workers managed to trap him in a barrel. He was then set free in the woods just off the freeway.

Link even has video:
http://www.1190kex.com/cc-common/news/sections/newsarticle.html?
feed=123543&article=2157358