Rule 7.08:
A runner is out when:
(g) He attempts to score on a play in which the batter interferes with the play at home base before two are out. With two out, the interference puts the batter out and no score counts;
Not exactly Chef's situation but close enough, I think to considering on-deck batter as a batter.
And:
7.09 It is interference by a batter or a runner when—
(c) Before two are out and a runner on third base, the batter hinders a fielder in making a play at home base; the runner is out;
Again, both rules refer to the batter but I'd say Chef made a good call in considering the jerk in the on-deck circle to have interfered with the play.
A runner is out when:
(g) He attempts to score on a play in which the batter interferes with the play at home base before two are out. With two out, the interference puts the batter out and no score counts;
Not exactly Chef's situation but close enough, I think to considering on-deck batter as a batter.
And:
7.09 It is interference by a batter or a runner when—
(c) Before two are out and a runner on third base, the batter hinders a fielder in making a play at home base; the runner is out;
Again, both rules refer to the batter but I'd say Chef made a good call in considering the jerk in the on-deck circle to have interfered with the play.