Prop Cian Healy is "happy to get off the mark" in the World Cup.
There was no adverse reaction in his neck and shoulder to his cameo role for Ireland, his first game time since April.
"I was a bit more nervous than I thought I was going to be and it was the final whistle that I was happy about," he reflected.
"You know, it was a long road of 24/7 with medics and in-and-out of rehab the whole time.
"To get over that first hurdle and have that behind me now is nice."
Naturally, the loose-head's next target will be to start against Romania at Wembley Stadium on Sunday.
In theory, the Romanians, ranked 17th in the world, should be a slight step-up from Canada, ranked one below them in 18th.
In reality, the men from the Balkans are scheduled for full-on combat with France tomorrow night, an experience that will demand all their attention.
They will then be asked to play Ireland in a four-day turnaround, just as Japan have had four days between South Africa and Scotland tomorrow afternoon.
Either way, Romania are not exactly shrinking violets when it comes to the trench warfare of the front row.
"It's not something I'm too worried about, getting back into the flow of it," continued Healy.
"I've been around long enough to be able to fit in and know what's going on. It's not totally new to me."
Leinster flanker Jordi Murphy is one of those likely to feature from the first whistle.
He will want to banish his most recent memory of playing second fiddle to Welsh openside Justin Tipuric at the Aviva Stadium last month.
"I've got to start the game from minute one," he stated.
"I can't just try and play my way into it.
"It's one of those things where it's got to happen from the off."
The sight of the overwhelming Irish support in Cardiff has given Murphy further reason to put down a marker against Romania.
"I'm obviously raring to go," he said.
"It's kind of tough watching the lads play and obviously it was a great result and they played very well.
"It's one of those things, only 23 can play on the day and it's a 31-man squad.
"Hopefully, if I get a run this weekend or sometime soon, I'll take it with both hands."
There is also an expectation that Robbie Henshaw will train fully this week to put him in the frame.