Surely if it were a bomb, the least appropriate thing would be to find the nearest heavily peopled building, preferably surrounded by aircraft and fuel trucks - and take it there?
That said, if it were a bomb then I imagine some sort of additional search of the aircraft would be in order. Once over from the dogs etc.
I have a question, it's a serious one - if it had been a bottle of water, or a yoghurt - given how seriously those are regarded by airport security, would it have been advisable to delay and return on account of them?