[Quick Time Video, Figure 2]

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Fig 2. Four frames of video clip 2 showing a typical startle-like episode to sound in our second patient with CLS at 13 years of age. These episodes were triggered by a loud noise and consisted of sudden arm extension and forward lurching of the body (00:41). If they had occurred while he was standing, then he would have fallen to the ground. At 6 years of age, he had a different type of drop episodes. Video clip 2 associated with this case also demonstrates the earlier drop episodes that were triggered by bumping into the furniture while backing up (00:16) or by a pull on his EEG leads (00:26). The numbers on the bottom left corner of each frame (MM:SS.000) represent the time after the stimulus.