Video 14. The flight take-off behavior of flies with the 7B hemilineage specific deletion of unc-4 in response to visual looming stimuli; 200X slower: left, control (5XUAS-FLP::PEST, unc-4^FRT/+; dbx^DBD/+; ey^AD/+); right, NB-3–2-GAL4 > unc-4^FRT (5XUAS-FLP::PEST, unc-4^FRT/y; dbx^DBD/+; ey^AD/+).

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