That’s hollywood fiction, but when I was in 5th grade, I witnessed a cow-like female try to stab an elderly teacher with a pencil. Fortunately, the attack failed and the female was never seen again (reform school, no doubt).
I remember reading some pulp fiction novel back in the early 80s, "Fighting Ninja of Death" or something. The hero dispatched a villain with a pencil held in his fist, between the two middle fingers. I've always wondered if the John Wick creators read the same book.