The young stand-off was on hand to finish off some great work from Graemem Morrison but collided with Doug Howlett as he stretched for the line.
With Ruaridh going off - he replaced Dan Parks just minutes earlier - Glasgow were left without a recognised kicker. The task of coverting Ruaridh's try was left to scrum-half Mark McMillan.
"I have never kicked at goal in my life but the ones that are in front of the posts are the most difficult," said Mark in the Scotland on Sunday. "No-one else wanted to take the kicks but, after missing the penalty, I got back to the dressing room only to find 22 people giving me advice on how to kick goals! Where were they all when I was looking for someone to take the kick?"
Jon Welsh was man-of-the-match for many observers and the young prop paid tribute to the coaching of Massimo Cuttitta who has been working on the Glasgow scrummage. "The competition in the squad is just amazing all the way from the front row to the wings. A lot of the credit has to go to (scrum coach] Massimo Cuittitta. He says that scrumming is all about 'technique, technique, technique'. Massimo's a little bloke and he suffered ten years of pain while learning the ropes so now we don't have to!"
The Sunday Herald carries an interview with Glasgow's Rob Dewey. The summer signing talks about his shift from centre to wing.