Anti-glycine receptor (GlyR) antibodies were first implicated in 2008 in a patient with progressive encephalomyelitis with rigidity and myoclonus (PERM). 1 The clinical spectrum linked to this enigmatic antibody has since evolved to include stiff-person spectrum disorder (SPSD), which comprises classic stiff-person syndrome (SPS), stiff-limb syndrome (SLS), and SPS-plus variants. 2,3 Epilepsy and other neurological presentations (eg, encephalopathy, brainstem encephalitis, cerebellar ataxia, movement disorders, demyelination, and cognitive dysfunction) have also been described. 2,3 Parkinsonism and visual disturbances are recent emerging novel features of anti-GlyR antibodies (anti-GlyR-abs) syndrome. 4,5 Here, we report a patient with myasthenia gravis (MG) comorbid and positive anti-GlyR-abs presenting with parkinsonism, unusual visual phenomena, SLS, and hyperekplexia syndromes.