All modern things were new to Geralt since he was more familiar with what they'd just been through than now, but he wasn't going to share that.
"Nekkars eat their young when the population of their hives gets too big. I assume it is the same for the gerbils."
The Coin Lady finally finished and the next customer moved up. This one seemed to be going well, at least, and the person in front of Geralt loaded their items onto the conveyor belt.
Then...
"Oh my god I forgot something!" The person in front of Geralt forced their way back through the line. "I'll only be a minute." He took off at a run before Geralt could say anything.