In Bejeweled 2, what happens if you swap two Hyper Cubes by each other?

Well i just got 2 Hyper Cubes and wondered what would happen if you swich those two past each other. If they destroy the colour that passes them, what would happen if two Hyper cubes where to pass?|||it would explode, idk.|||when i did it it didnt do anything and i was pissed so dont do it. lol