Not all jeeps but it is good, it says its in Russian but from what I remember Minnesota mud pits are just like this.
http://vids.myspace.com/index.cfm?fuseaction=vids.individual&videoid=1369762803
And if rocks are your thing I found this XJ vid
http://vids.myspace.com/index.cfm?fuseaction=vids.individual&videoid=1169867985
http://vids.myspace.com/index.cfm?fuseaction=vids.individual&videoid=1369762803
And if rocks are your thing I found this XJ vid
http://vids.myspace.com/index.cfm?fuseaction=vids.individual&videoid=1169867985