There are Star Wars Easter eggs in Indiana Jones movies? Yep, it's not just an urban legend. Maybe because I just finished reading the excellent '80s sci-fi book Ready Player One, but I'm obsessed with Easter eggs lately.
Gizmodo has a story detailing where you can find them all, including this photo of C-3PO and R2-D2 in Raiders of the Lost Ark. I'm not sure how "cool" I think this is. Maybe I'm just a grumpy old man, but I like my '80s sci-fi and fantasy flicks a little more uncorrupted.