We have observed dynamic optical crosstalk between pixels in a twisted nematic device that demonstrates the significance of switching-induced flow in pixelated devices. We studied these phenomena in detail, both experimentally and theoretically. Experimentally, we found that switching of one pixel in a linear array causes an optical response in neighboring pixels which are not switched. The optical crosstalk depends on several factors, including: switching voltage, voltage applied to the unswitched pixel, distance between the switched and unswitched pixel, and the location inside the unswitched pixel where the optical response is observed. Theoretically, we attempted to describe this behavior using a quasi-one-dimensional model based on the Erickson-Leslie equations. This simple model, while intuitively appealing, deviates markedly from the observed results.