Smrter made you hallucinate whenever you went near the helicopter in the swamp, and the circus anomaly too, but none of the psy anomalies made you hallucinate oddly enough, which wasn't fun at first either way, being mobbed by any one of the three worst things in the game just for the fucking maps seems like fucking hell though.
I'm sure I'll be geared up enough to deal with it by the time I do it though, I always put off the helicopters for a really long time while I fuck about and hoard shit to drag to Yanov.