Robert Downey Jr
Here's a lesson in how to upset Iron Man.
During a recent Channel 4 News interview Krishnan Guru-Murthy wheels out some hard-hitting questions that would leave a dent in even Tony Stark's armour.
Skip to the end if you want to see the actual walk-out because it gets awkward quickly.
On the plus side, RDJ is wearing some snazzy trousers and the video is beautifully lit.
Read the full story on the Channel 4 News website
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