Let's be glad the negative effects of Zen are strictly physical, eh? And, for that matter, that Fionn has a form of direct reference to be able to know that his perceptions are off.
"Lemme check..." Fionn did a quick bit of AR interaction, finding that he was feeling a little sluggish, but otherwise could work just fine. "Aug'd space seems fine... Gonna dive for a minute, see how I feel on that side... With that, he dropped into virtual reality, appearing to everyone in the truck to pass out for a few seconds. As soon as he came up in the real Matrix, he felt oddly free - more so than usual, free not just from the limitations of the meat but also from the slowing effect of the drugs. May as well see how long this lasts... He checked the effet duration of Zen, and if it had any nasty crash effects.
Bracing to go back into the molasses, he slipped back into meatspace, snapping back awake just as quickly as he passed out. "Drek's slowing me down, but only physically - my mind's still fine. Might cause an issue if I have to do anything in a real hurry in AR, but it doesn't effect me at all in VR. Should wear off inside an hour, and from what I've found the crash isn't even as bad as from caffeine. Assuming it was straight Zen, at least." He paused for a second, or at least that's all it seemed like to him.
"Best get used to me dropping in and out like that, by the way - if I need to be in VR when we're on the job, the time it takes to explain could be too much. As for the places, there's a couple; both are in or around the mall near the edge of town. I'm probably not reacting fast enough to give proper turn-by-turn, though..." Fionn started fishing around in the glove compartment for paper and a pencil. "Bloody hardcopy. There's just something wrong about this..." He sketched out the turns for Clem and handed her the horrifically drawn map. "Me and hardcopy have never really been friends. Can ya tell?" His delivery was a little off, but he still chuckled a bit to himself.