I have just discovered Don McMillan's stand up. It is gold. Engineer jokes by the bucketful.

Example : ebay - the internet = garage sale.

Example : a physicist, a biologist and a chemist go to spend a day at the beach. The biologist goes out snorkelling, gets entranced by the underwater plant and animal biota, forgets to check his air flow and drowns. The physicist sees that the biologist has not returned and goes out to check his last known location. He gets entranced by the pressure gradients, wave effects etc., forgets to check his air flow and drowns. The chemist looks around, can't see either of them, gets out his notebook and writes "biologists and physicists are both soluble in water".

Creative use of venn diagrams is a bonus. Love the guy.