It looks like Robert Downey Jr. gave one comic book store clerk a day to remember. The "Iron Man" franchise actor was spotted buying both "Iron Man" and "Avengers" comics in Hollywood on Wednesday (June 2nd). It appears he’s doing his homework for when he brings his Tony Stark/Iron Man to the set of Marvel Studios’ The Avengers, which he’ll film after shooting Sherlock Holmes 2.

You can check out a bunch of photos of Downey Jr. at the comic book store at Just Jared!