This guy was working in a lab which had bred a strain of dolphins that would live forever as long as they were fed seagulls every day. One day the lab ran out of seagulls and the man had to run out and get some. As he neared the beach, he saw a group of lions sleeping in the path. He carefully stepped over them, dashed down to the beach and collected some seagulls, but as he was returning to the lab he was arrested for transporting gulls across sedate lions for immortal porpoises.
I'll get my coat.