Relate the following anecdote, or one like it, to the audience. Directions are bold and in brackets.
“You may or may not know it, but I used to wait tables back in college. It was a fairly simple job since the restaurant, named ‘Cheesies’ had relatively few menu items to choose from: cheeseburgers, cheese pizza, and cheese sticks, and to drink: just water and raspberry Kool-aid. Even with these limited choices, it seemed I was always in need of a third hand: one to carry a pitcher of water, one to carry a pitcher of Kool-aid and one to carry the pen and pad to take their orders. One day, in the chemistry lab, I came up with an ingenious way to solve my problems; I invented my very own magic pitcher [hold it up, proudly], capable of pouring out either water or raspberry Kool-aid on command. It was very popular with the patrons, and the other waiters were quite envious. They begged me to let them borrow it, but I told them that if they did not have a strong foundation in chemistry, the pitcher would not work for them. The pitcher came in especially handy one day when I had an unusually fickle group of four gentlemen sit at one of my tables. I remember it quite well…
The first asked for water. No problem, I told the pitcher water, and out came his water [pour about 200 mL from the pitcher into beaker A — it should be colorless].
The second asked for Kool-aid. No problem, I told the pitcher Kool-aid and out came his Kool-aid [pour about 200 mL from the pitcher into beaker B — it should turn dark pink as it his the glass!].
Well, the first guy tried his water, said it tasted funny, so could he please change his to Kool-aid too. No problem, I took back his water [pour beaker A back into the pitcher], and took back the second guy’s Kool-aid [pour beaker B back onto the pitcher], and then I poured them both out the Kool-aid they wanted [pour out pink Kool-aid into beakers A and B]. Well, you all know what the third guy wanted: that’s right, water. So I told the pitcher water, and out came his water [pour out 200 mL from the pitcher into the beaker C — it should turn colorless. Most impressive!].
Well, wouldn’t you know it: now the first two guys said they thought that water looked mighty fine, and asked if I wouldn’t mind changing theirs back to water. By then I was getting a little frustrated, but I was trying not to show it, so I took back their two Kool-aids [pour beaker A and B back into the pitcher], and of course I had to take back the third guy’s water [pour beaker C back into the pitcher], then I poured all three out the water they wanted [pour out colorless water into beakers A, B, and C]. And what do you suppose the fourth guy wanted? You got it: Kool-aid. So I told the pitcher Kool-aid, and out it came [pour about 200mL from the pitcher into the beaker D — it should turn dark pink!].
Well, the first guy started to say something, but I just cut him off and said I know, I know, you all want Kool-aid, so I grabbed up their waters, as well as the fourth guy’s Kool-aid [with frustration on your face, pour all four beakers back into the pitcher…]. I said, ‘There you go, are you happy!?’ And the first guy said ‘Actually, we were hoping for milk.’ ‘I quit.’