"Multitasking? I can't even do two things at once. I can't even do one thing at once"

This quote by Helena Bonham Carter is an amusing way of revealing her failure to multitask. She is indicating that she is not able to concentrate on more than one task at a time, and even has a hard time to concentrate on one job. This could be translated as an indication of her being overwhelmed by the amount of tasks she has to do, or it could be an indication of her being easily distracted. It could likewise be translated as her being a perfectionist, as she is unable to carry on to the next task until she has finished the existing one. Whatever the factor, this quote is a funny way of expressing her trouble in multitasking.