Robots say the craziest things

This morning, while hurrying down the concourse at La Guardia Airport, I tried to dictate a text message to my Nexus 4 while wheeling my suitcase behind me. It got the dictation fine, but appended "kdkdkdkdkdkdkdkd" to the message — this being its interpretation of the sound of my suitcase wheels on the tiles.