Lydia Nohemi Drexler posted, "The funniest thing is New Yorkers are passing by like, oh look another famous guy playing drums in the subway, whatever I'm late to work".
Gordon-Levitt donned a dapper suit and started bashing away on his cymbals as part of his project HitRecord, a video-based social network and uploads site.
As part of a collaboration with LG, Gordon-Levitt was drumming to encourage other musicians to follow his lead and upload video of them performing.
After all, if he, former child star Joseph Gordon-Levitt, can do it without being harangued by 10 Things I Hate About You fans, anybody can.
One man, however, paused to make an acute observation: "You look like Pee-Wee Herman!"