Hitting a "Devil Duckie" with a/b/g particles. For no real reason. :-)
Looking at this now, I see that I didn't have a moderator in between the duck and the particle source. So I might have been picking up some Beta but the neutrons would have still been traveling too fast for my poor mans Geiger counters to measure well. Ah well, rigorous study wasn't really the point here! :-)
But it was a good 10 minute diversion for a laugh! I do remember being surprised at how much energy seemed to be being blocked by the duckie, but not interested enough to explore further. A chuckle, some photos and then I moved on.