Iain Forrest was passionately performing for evening rush commuters at the Herald Square subway station when a woman came up behind him and smacked him in the back of his head with his water bottle.

Forrest, a medical student and electric cellist with the stage name Eyeglasses, says the random attack happened at exactly 5:50 p.m. on Feb. 13 and it was all caught on video. His assaulter appeared to be leaning on a column at the 34th Street station while looking at her phone when she suddenly put the device in her tote bag, marched behind Forrest, grabbed his metal water bottle and forcefully struck him.