1. A method of sending a graphical expression during a text messaging session comprising: receiving user input on a first computing device, the user input specifying a graphical expression mode; determining, by analyzing data from one or more sensor of the first computing device, that the graphical expression of the specified graphical expression mode is to be performed; and transmitting an expression command from the first computing device to a second computing device through a network during a communication between the first computing device and the second computing device governed by a text messaging protocol, the expression command identifying the graphical expression to be performed on the second computing device.