“There would have been no time for a radio call or anything like that.”
While this theory might explain one mystery however, it still does not quite add up.
For example, Thai and Malaysian military radar shows the plane turned 180 degrees and flew down the boundary between airspaces.
This implies that whoever was flying the plane was deliberately taking it off-course.
Mr Learmount added that the lack of wreckage implies the plane did not explode in the air.
He said: “The wreckage would have been over a wide area – and what’s more, the wreckage would have floated because it’s not like an aeroplane either diving into the sea or making a controlled landing on the surface of the water and then sinking more or less complete, where only a few bits come off.
“No, this would be one where stuff was floating all over the place.
“It would have washed up on beaches all over southeast Asia.”
In fact, no debris was spotted in the water at all, despite a huge international effort.
Two confirmed pieces of MH370 have washed up on Reunion Island and Mauritius in the Indian Ocean, as well as one on the beach of Tanzania on the east coast of Africa.
A number of other pieces of debris have been found but none are confirmed to be from MH370.
The official investigation concluded that the plane likely ended up at the bottom of the southern Indian Ocean.
It is also believed to not be an accident – in other words, someone on board was in control of the plane when it vanished.
However, some people dispute this and there are dozens of possible explanations for the MH370 mystery.
Aviation experts told Channel 5 it is vital that investigators get to the bottom of it, to stop the same thing happening again to another aircraft.