falling dominoes

Six dominoes are lined up on a table.[br][br]The first in line is tipped and knocks its neighbor over.[br]The neighboring domino, in turn, knocks its neighbor over.[br][br]Each domino remains essentially at the same place[br]on the table.[br][br]Yet, something seems to move.[br][br]What moves? In what direction? How fast?

Information: falling dominoes