Downey Jr. waiting to film scenes with his co-star Johansson for The Avengers, was fiddling around with some gadgets on the Iron Man Suit.
Downey Jr, hit the wrong button, which controls an arm of the suit, triggered it, and hit Scarlett Johansson (Black Widow) in the face.
A source said: ‘It suddenly jerked backward and whacked poor Scarlett.
Johansson staggered backward, lost her balance and fell off the low platform they were standing on.
Johansson was unharmed.
The source told National Enquirer magazine: ‘Robert, who couldn’t help because he literally can’t move in that iron suit, was beside himself – he kept apologising.’
‘Scarlett smiled about the incident.’
Special thanks to MUReview reader James Ruddy for passing this along.