Wait until you die and enable the fly code to come back on the battlefield. Then, enable the walk code to walk normally. Nobody will be able to see you. Note: To come back as a warrior, you must be killed or commit suicide again; however it will not count as another kill or suicide. Also, when a match is finished with a view of your player, enable the fly code and watch him swim around the battlefield. You can still shoot, but it does not seem to do anything.