Clever Trevor haunts Glens.
The 32-year-old Scot pieced together a superb hat-trick to leave his old club with just a single point from four Premier League matches.
Glens still haven't been paid for Smith, who opted not to extend a two- year contract. And it won't be much consolation that the transfer tribunal must rate Trevor at least a pounds 15,000 player on this evidence.
Smith never really caught fire in his days at The Oval . . . but he was pure genius in a Portadown jersey.
Two headers and a snap shot were much too sharp for a pedestrian Glentoran back four.
The beating subjected Glentoran's manager and board to an angry fans' demo at full-time when chants of 'Out, out, out' echoed around the ground.
Yet it was desperately unfair to Glentoran who played sweet football and might have knocked in a pile of goals.
"Week after week of frustration," lamented boss Tommy Cassidy with considerable justification. "No side outplays us but we lose for all kinds of reasons."
The manager didn't need reminding that his team had been in front in exactly 27 seconds.
Ian Duerden - on loan from Burnley - struck a fine outswinging cross and Tom McCourt had the ball in the net before anybody had broken sweat.
But that's when Glentoran treated Smith with fatal contempt. Trevor was permitted a free header at the far post in 14 minutes and equalised so casually.
A marker was also missing 10 minutes later when Smith gathered from Garry Haylock, spun fast in the box and cracked a right-footer wide of Neil Armstrong.
The second half should have been the Glen Little show. Glentoran's classy forward did everything but hit the net. Only a string of bizarre goal- line clearances robbed him.
Glentoran hopes died four minutes from time when Smith turned the final screw, soaring above home defenders to bullet in another header from a Paul Evans offering.
Strangely, Glens cancelled it out within 60 seconds. Substitute Andy Kirk finally got the goal that had refused to happen for so long.
Alas, it was all too late.