The Kilmarnock striker not only scored his side's goal in a lively second half in Paisley, but was then also sent off not long afterwards for lashing out with his arm at St Mirren's Jim Goodwin.
The dismissal proved to be a turning point in the game, the home side finding an equaliser through Gary Harkins soon after before pouring forward in search of a late winner. Only some poor finishing and resolute defending kept it at 1-1, much to Boyd's relief, presumably. Both managers took the Arsene Wenger approach to the incident, claiming not to have seen it despite it taking place yards from their technical areas, although Allan Johnston revealed Boyd had apologised to his team-mates for his indiscretion.
"Goodwin had been going through the back of the strikers a few times and Boydy reacted, but it is not like him," said the Kilmarnock manager. "Everyone makes mistakes, but it is disappointing when it costs points. He apologised to all the boys. It was just a stupid reaction and you can't afford to do stupid things like that."
Goodwin admitted he had caught Boyd with his arm prior to the sending off but there had been no malice in it. "I brushed him with my elbow accidently as we challenged in the air and he has reacted badly but he knew instantly that he shouldn't have done what he did," said the St Mirren captain.
"I've been there - I've done stupid things in the heat of the moment and I know how he feels right now. I'm sure he regrets it."
Boyd was barely involved in the first half but made up for that during his 15 minutes on the pitch after the interval. He scored after 49 minutes, the impressive Rabiu Ibrahim robbing Paul McGowan of possession, darting halfway up the pitch before feeding Sean Clohessy wide on the right flank. The right-back, making his debut, sent over an enticing near post cross and there was Boyd to put Kilmarnock in front from around eight yards out, his favourite range. His next major involvement wasn't quite so positive. He didn't seem to catch Goodwin with the strongest of blows but it left referee John Beaton with little option but to send him off.
It didn't take St Mirren long to capitalise and within four minutes they were back level. Danny Grainger's corner wasn't properly cleared and Harkins, the former Kilmarnock player, was in the right place to poke the ball past Craig Samson.
Thereafter the momentum was in St Mirren's favour and although they will feel they should have done more to capitalise, Kilmarnock will reflect on the fact they should have been more than one goal to the good by the time Boyd was dismissed. Paul Heffernan headed over after being picked out by Ibrahim, before Jackson Irvine, on loan from Celtic, thrashed in an effort that also soared over the crossbar.
St Mirren, though, really ought to have snuck a win in the closing minutes. McGowan hared into the box only to curl his shot just wide of the far post, while defender Marc McAusland somehow failed to get a touch on Harkins' pass across the face of goal.