Some may say he should have gotten a Best Supporting Actor win for Tropic Thunder ... Robert Downey Jr. may have reached a huge career landmark with his Oscar win. But based on his wife's funny ...

Robert Downey Jr says his mum gave him a bit of a warning before Tropic Thunder hit the cinemas. The Iron Man actor, who turns 59 on Friday (4 April), famously starred as Kirk Lazarus in the 2008 film ...