Since we observe a behavioral shift in TH-C-AD;TH-D-DBD flies over the time course of ten minutes, I hypothesized that this might be either due to an excess neuronal stimulation during this ten minutes (threshold) or that flies do learn something about the contingency between their own behavior and the resulting stimulation. To test these hypotheses, I stimulated flies for 5 minutes with the same light stimulus usually used for the experiment. During this 5 minutes, flies had no control over the stimulation therefore excluding a learned association of behavior and outcome. If the behavioral switch was merely due to excess stimulation, this 5 minutes of uncontrollable exposure should also affect behavior.