Eva Mendes shows off her party trick - blowing her cheeks out like a chipmunk and talking at the same time. The actress said she learned to do it as a child and has been wowing people with her skill ever since. She said: "This is a talent that only I can do. Basically I fill up my cheeks with air and I can talk through it." Talk show host Conan O'Brien tried and failed to emulate her. He joked: "Anyone tuning in would think you had major dental surgery today." Eva, 37, said: "My mum would really egg me on when I was little." The Hollywood beauty also told how she can't swim - despite having a pool in her house. She said on the TBS network show: "This is my last arena that I have to tackle."