Of course your best friend was flying one of the two drones!
5.2 Aircraft Operation. Just like a manned-aircraft PIC, the remote PIC of a small unmanned aircraft is directly responsible for and is the final authority for the safe operation of the small unmanned aircraft (§ 107.19). Additionally, a person manipulating the controls (who is not the remote PIC) can participate in flight operations under certain conditions. It is important to note that a person may not operate or act as a remote PIC or VO in the operation of more than one small unmanned aircraft at the same time (§ 107.35). The following items describe the requirements for both a remote PIC and a person manipulating the controls.