He walked up to a large anthill and struck the top of it forcefully two or three times with his hand held flat. He then held one hand quite level about an inch above the anthill and waited. I was wondering what was happening, and then I understood: under attack, the ants exuded formic acid with which Lazo covered his hand. He then rubbed his hand over his arms, over his other hand and over his face, which were thus protected. The others followed suit. To show me the effectiveness of this action, Lazo held up his bare hand, with a cloud of insects swirling around it and not one of them landing
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