Sounds painful.
So if you were a bus driver, and at the first stop, two people get on and one guy gets off, and at the next stop, seven people get on, and at the next stop, two blobs fly into the bus and push everyone out, and at the next stop, nothing happens, and at the next stop, the two blobs split into four blobs, and one of them leaves, splits into three blobs, and two blobs get on the bus, and at the next stop, the bus explodes...
Who was the spy?