Additional Supporting Information may be found in the online version of this article.

MDS_23626_sm_suppvideo1.wmv5662KSupporting Video 1 Spontaneous saccadic oscillations, also visible with closed eyes, exacerbated with pursuit. The movements occurred intermittently, and there did not appear to be an intersaccadic interval.
MDS_23626_sm_suppvideo3.wmv1998KSupporting Video 3 Exaggerated startle with blinking of the eyes and flexion of the neck to expected and unexpected auditory (clap) and visual (light) stimuli.

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