Alexandre Ethier and another man began kicking and punching the victim, and courthouse special constables had to intervene.
The 25-year-old pleaded guilty to assault in connection with the May 24 incident, which was captured on a security camera.
Assistant Crown attorney David Didiodato and defence counsel Jennifer Tremblay-Hall jointly recommended he be sentence to one-day time served (15 days).
Didiodato also asked that he have no communication with the complainant while he is incarcerated.
Tremblay-Hall said the two men aren't housed on the same range at the Algoma Treatment and Remand Centre.
"Either way if I run into him I won't do anything," the accused told Ontario Court Justice Melanie Dunn, before she imposed the sentence, adding "I apologize for my actions."
Ethier remains in custody on other matters.
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