http://www.chessvariants.org/large.dir/capafool.html
is a web page with a fool's mate (in GIF animation) for one of
Capablanca's variants. This one and a half move mate also works in
Capablanca's original 10x10 variant.
Some mates are more foolish than others, consider the following example
from Grand Chess: 1.d3-d5 e8-e7 2.Ke2-d3 Qd9-h5 3.Qd2-e2 Qh5-d5 mate.