Here's a story relayed to me:. Iranians were sent to the US for pilot training and wore red helmets for identification purposes. One day, a couple instructors grab a couple red helmets and saddle up in a T-38. They launch and return to the T-38 pattern using an Iranian-ish accent. On the first touch and go, the IP in the front seat ducks down so the RSU sees an Iranian student solo in the back seat. The RSU freaks out and queries the "solo" who responds " I will fix.". On the next pass, the IP in the back seat ducks down so the red helmet is now in the front seat. Not sure that practical joke would be appreciated today.
BTW, this was at Columbus pre-Ayatollah.