They used to but not any more. You kind of get used to it - you accept it is part of your job - if you're famous and you want this life you have got to accept this part of it as well.
Some scenes you juggle two balls some scenes you juggle three balls some scenes you can juggle five balls. The key is always to speak in your own voice. Speak the truth. That's Acting 101. Then you start putting layers on top of that.
