Its not possible to have inversions on suspended swinging coasters. If it were to go over a loop, it would flop to one side and it would hurt a lot. Inferno doesn't swing, that's why it can go through inversions without flopping over. The only way Vampire would be able to complete a loop, is that it went very very fast, but even so, the force would be too much for the riders at that speed so yh.