Practicing neuro exam..

Practicing neuro exams on our classmates..

Professor & classmate: *Hits my knee with the hammer*
Me: 

No, not THAT lively. Lively enough though.

Me: *Tests patellar reflex on classmate*
Classmate: ... (*Nothing happens*)
Me: ..? *Tries again*
*Nothing happens*
Me: 

Just my luck to have super lively reflexes that are good enough to show for demonstrations and are good to practice with, only to end up practicing with a classmate with virtually absent reflexes. The hell..