Hugh Culber (He would have let them know it's strange being here knowing it's just limbo, and Paul needs him back home.)
Tom McNair (He'll have told people he needed to get back to fight the devil.)
*keep in mind that with glitches, all your character knows ICly is that they didn't tell them they were leaving. Whether they chose to leave without saying anything or a glitch happened is purely for OOC knowledge.