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As the two of us learned in Geology class this semester, there are two types of basalt lava: "pahoehoe" is smooth flowing, whereas "a'a'" is broken up and sharp (it's name is what you utter when trying to walk across it). Here we demonstrate the latter concept by each saying "a!" which when combined, is a'a'. Ingenious, I know. Actually, we just look stupid. But that's ok. Do it for the geology...

As the two of us learned in Geology class this semester, there are two types of basalt lava: "pahoehoe" is smooth flowing, whereas "a'a'" is broken up and sharp (it's name is what you utter when trying to walk across it). Here we demonstrate the latter concept by each saying "a!" which when combined, is a'a'. Ingenious, I know. Actually, we just look stupid. But that's ok. Do it for the geology...