The attorney for a man injured in a bizarre snowball fight accident on Wednesday argued before a three-justice panel of the Delaware Supreme Court that testimony regarding his client’s marijuana use in a medical malpractice suit went beyond its permitted purpose and prejudiced the jury that ruled against him.

The man, Joseph Hineman, had sued his doctor, Paul Imber, for medical negligence in sending him home, instead of to a hospital, after examining the injury, which ultimately resulted in a stroke and partial paralysis.