Mann made an impressive debut in Glasgow's win over Bath at The Rec in December 2022, but he needed to wait almost two years for his second game after a terrible run of luck.
Franco Smith name-checked Mann for his performance post-match and the back-row man was visibly delighted after his first appearance at Scotstoun.
He admitted: "It's been something I've been working towards the last couple of years and just trying to keep my head down and keeping my eyes on that.
"It was an amazing feeling, especially making it all the more special being actually at Scotstoun. I had the run out against Connacht in pre-season, but to get a proper professional game at Scotstoun with a relatively full stadium - it's an amazing feeling.
"There's always a little bit of nerves before a game but I feel like I've done enough training to sort of get my head around our whole playbook and everything like that the last two years, so I felt pretty confident coming into the game."
Mann was ruled out for a year after sustaining his third concussion during his debut against Bath. Due to protocols, Glasgow decided to stand him down for an extended period before he broke his ankle after his return to training and there were some tough times on the comeback trail.
"It was tough but I've got a very good support network from my family and friends," Mann admitted. "Even from the boys at the club, it's a great club to be at and it's a genuine joy coming in here. Even if you are in the rehab group and just to come in to train and spend time with the boys is brilliant. I think that also translates to our results on the pitch the last couple of years is just a testament to the environment that we're in.
Speaking about his extended break after his debut in Bath, Mann said: "It was purely protocol. I was very lucky, I didn't have many symptoms after the Bath game, but it was just the fact that I'd had three in a year.
"So If I came back after three months, which I was meant to, and I got another one, then I would have been out for six months. So they just stood me down for a year and that meant it reset. So that allowed me to then come back, but then unfortunately my ankle went again."
Mann feared his bad luck had stuck again in training as the squad prepared to face Scarlets.
"Last week we were doing a unit session and I kind of rolled my ankle and I was thinking, this cannot happen again. But the feeling of relief is massive and it's a night that I've been dreaming of for a while."