Walt Disney once explained overlapping this way, "It is not necessary for
an animator to take a character to one point, complete that action
completely, and then turn to the following action as if he had never given it
a thought until after completing the first action. When a character knows
what his is going to do he doesn't have to stop before each individual action
and think to do it. He has #planned in advance in his mind. For example,
the mind thinks, "I'll close the door - lock it - then I'm going to undress and
go to bed." Well, you walk over to the door - before the walk is finished
you're reaching for the door - before the door is closed you reach for the key
- before the door is lockedyou're turning away - while you're walking away
you undo your tie - and before you reach the bureau you have your tie off.
In other words, before you know it you're undressed - and you've done it in
one thought, "I'm going to bed.' " [12]