It’s risky enough to use a public bus as a getaway vehicle. But it really blows your cover if a dye pack explodes while you are trying to blend in with the regular commuters.

   A passenger alerted cops to the dye pack explosion, but the robber left the bus before they arrived.

   The robber was appropriately disguised — a bandana with the cap on top and big glasses— for bank surveillance cameras. But St. Petersburg police suspect he didn’t realize the buses have surveillance cameras, too.