Easter egg: (Blu-ray) On Disk 1, open the "Extras" submenu and highlight "BD-Live". Press the Right arrow/button and a wire-frame of Iron Man will appear below it. Press the Enter button and a brief behind-the-scene vignette between Stan Lee and Robert Downey Jr. will appear.
Easter egg: In disk 1 under special features, right in between 'Preview' and 'Main Menu' a symbol appears when highlighted. Click and you can watch an interview with Stan Lee.
Answer: Iron Man by Black Sabbath (minus the lyrics).
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