So, if you don't know yet, flight MH370 disappeared. From that, many theories have been proposed, from being shot down and hijacked, to alien abductions. It'd be interesting to know what you think happened to flight MH370.
Knowing the factual background would be a good start, but based on the few indices we have, it is difficult to say anything. However I think it most probable that they had trouble with the weather, like in the recently crashed AirAsia flight.
I say it was hijacked in mid air just like the planes used in 9/11 by a underground terrorist group who might eventually reveal themselves to the World by using the plane to strike a target that they wish but then again it is just a theory