Yip. This is a strange, but intriguing request.
Put lots of slop on the pushrod-linkage-horn. Put the rudder throw to maximum i.e. place the push rod linkage as far in on the horn i.e. the hole closest to the rudder hinge.
Also, put only two hinges close to the center of the rudder so that there is lots of slop where the horn is (at the bottom).
And, cut some lightening holes in the rudder sheet (if it's not built up) and this will make the rudder twist easily.
Make sure the rudder is exactly at neutral so that there is no aerodynamic forces on it in normal flight. Any turbulence (prop wash, etc.) will setup a flutter in no time.
All of the above will make for a sure-fire accident waiting to happen.
Then all you need to do is fly the plane fast. A long shallow dive from altitude should do it.
Let us know how it goes. I think that if you do the above you might just have your hands full right after takeoff.
-Q.