So...all of it can be set off by Cubey passing through , being the large mass it is and unintentionally protecting the vamps and cops in the back. Picking up everything that isn't bolted down with just enough force, ruining the set up... that's the only way I can see this going down @_@
Frankly, I had expected the traps to be set up where the other vamps would be coming through so that there was no risk of Cubey messing it all up.