Here's another ‘Last Laugh’ bit I did for the Reader’s Digest March 2010 issue. Parts reproduced with permission of Reader’s Digest.

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Certain combinations just don't work. Vinegar plus baking soda causes an explosion, as do Kathy Griffen and an open mike. Here are some other questionable combinations in handy venn diagram form.

The above is the part that made it into the magazine. For the terrycolon.com reader, below is a little more of the same. A free bonus political-economy section.