The untold story: 1.) the grade was curved due to everyone's low numbers
2.) no one wanted to get near the rocks to identify them because there was one weird mofo walking on all fours around the displays, randomly snarling and licking each one
Homeslice identified a few more than everybody else and his grade shot to the moon.
They we're actually kind of okay with the licking until taking his sweatshirt on and off aggressively while grunting and sweating... That's what made it too much for them. Geology nerds.