Choose one of the soldiers in the first full squad (not the sniper team or pilots), such as the Autorifleman, then proceed to board the heli like the squad leader orders, enjoy the short ride, then watch as one or both helicopters turn and go into a hover randomly. Also note that the AI squad leader in one of the helis will never order a get out, while the other leader very rarely will order get out, but then not do anything further at all.