The Dragons are in trouble now with Jack Bird sin binned for spraying referee Liam Kennedy.
After giving away a penalty, Bird got up and yelled at Kennedy, who marched him 10 metres for dissent.
But when Bird kept going, Kennedy blew his whistle again and sent the Dragons star from the field for 10 minutes.
Almost immediately afterwards the Tigers extended their lead through Thomas Freebairn, who now has two tries.