Yeah, that was part of my hunch. They only film certain scenes, some effects and stuff are added later, and they probably talk with psychologists or something to make sure they understand and aren't scarred.
My custom work system:
ASUS P7P55D-E LGA 1156 / Intel Core i5-750 / CORSAIR XMS3 4GB (2 x 2GB) / Windows XP SP3 /
SAPPHIRE 100292L Radeon HD 5450 / 2 LITE-ON 24X DVD Writers SATA Model iHAS424-98 / 2 W.D. Caviars Black WD1001FALS 1TB SATA 3.0Gb/s / Antec Sonata III 500 Black with 500W Power Supply / Rosewill RCR-IC002 74-in-1 USB 2.0 3.5" Internal Card Reader w/ USB port