Pshh, whaaat? Of course not! I know exactly where we are! Who do you take me for, some kind of amateur?! [he's totally lost, they're fucked, they're gonna be lost in this hell forever and Leo is gonna get eaten by tentacles or demons or something...] See, this tunnel is familiar, right? We're backtracking a bit, so it's definitely familiar! We definitely can't be lost!

[this is fine. he just has to stay cool and confident until he can get back on track... maybe Izumi somehow hasn't realized all these damn tunnels look identical anyway.]