Previous audiences, including those in the medical profession, have learned plenty from Barrett's first-hand account of Tourette's and he is unexpectedly investigating taking the show on the medical conference circuit.
A passion for performance and gift for music and drama lea Barrett to the stage, an unlikely career for someone fighting the uncontrollable urge to do the unexpected.
"It's generally agreed that the best point to start with as a performer is stillness so I started off at a disadvantage," he said.
But through self-control he has taught himself, without medication, to control the tics in public - letting them run riot again when he gets home.
"I just sort of had to fight it out for myself," he said.
The show was suggested and written by close friend and award-winning playwright Michelanne Forster and directed by Jennifer Ward-Lealand.
Tic Tic will be held at Te Puke Repertory Theatre tonight (Wednesday) at 8.30pm.
Tickets available from Baycourt.