People have a habit of attributing things to the "Paranormal", when for whatever reasons they can't seem to understand them, or quickly fit them somewhere within the confined space we define as reality.
I remember listening to a late radio talk show, "The Eddy Schwartz Show" on WIND in Chicago back in the mid 1970s. One night a caller told Eddie that there was a kangaroo hopping down the street in Chicago, of all places. Of course over the next few days all the experts came forward and claimed that there were no kangaroos in Chicago except in the zoos, and the zoos accounted for all of theirs. So the caller must have been mistaken or? The radio was alive again for the next few weeks, of everyone and their grandmother popping out of the woodwork with explainations of these "Phantom Kangaroos". Many of the same attributes given to bigfoot today by those that believe in those theories, were given to the kangaroo in Chicago. A few weeks later, the kangaroo was in fact cornered in a back alley by two Chicago Police Officers. While waiting for backup, and trying to keep the kangaroo cornered the kangaroo decided he had enough and attacked and physically injured both of the officers.
So, could it have been a real kangaroo? Considering that kangaroos have been reported all over Southern Wisconsin and Northern Illinois for years, it's possible. The earliest report of a kangaroo that I could find referenced online, was 1899 in Wisconsin. In December of 2005 it was reported that a kangaroo was killed by a Mauston, WI man as he drove down his driveway. That turned out to be a 50 pound wallaby. A few months later a 5 foot tall, 150 pound Red Kangaroo was captured in Iowa County Wisconsin. Nobody knows where either of these creatures came from.
Here is a link to watch video of the kangaroo being captured in Iowa County, you'll find it on the right hand side of this page, from CBS News.
http://www.cbsnews.com/stories/2005/01/10/national/main665977.shtmlAlso bigfoot has been brought within the field of ufology, where people there have reported bigfoot as being aliens, pets or livestock of the aliens, members of a scouting patrol, and as even being the pilots of some UFOs that were spotted.
My feelings are if it exists it's a physical creature, not something of the paranormal realm or alien.
