stupid field
The area of effect around certain individuals that causes nearby victoms to experience an instantansous decrease in I.Q.
Unusually powerfull stupid fields have been found to make nearby rocks less intelligent than average rocks, resulting in so called dumb rocks.
Eugene has with him a potent stupid field.  All those unfortunate enough to be trapped within it experience lapses in all mental functions.

"Hi... uhhhhhhh..... What was I doing?"