Bobby takes his leave
Bobby had been more than a little freaked out by the idea of Here self-destructing, and when he saw the sign in the lobby, he let out a whoop of joy and went out onto the front lawn of the Residence.
Raising his hands out in front of him, he used his powers to leave a last farewell to anyone still left. In ice letters eight feet tall and four feet thick, he spelled out the words:
Good Bye!
He figured anyone who knew him would know who it was from.
He went back inside and disconnected one of the gaming systems from the game room, got a case of the cakes he liked that had been discontinued in his world, then bolted for his room.
He didn't even hesitate once he saw the cube, and he was GONE.