Akathisia is a common extrapyramidalside-effect of antipsychotic (aka neuroleptic[?]) drugs. It usually manifests as pacing and a total inability to sit still. If forced to sit still the person experiences extream anxiety and agitation. In bad cases the anxiety and agitation may get worse even while the person is moving. Akathisia usually responds well to drugs commonly used to control extrapyramidal side-effects.
... which he had performed onstage before taking it to Hollywood.
Academy Awards and Nominations
1945 - Nominated - Best Actor in a Supporting Role - Since You ...