Comment 11 for bug 894951

A second way to just get a hijacker back is just not discoverable. It is an edge case and if you don't know about the new hotkey, you would have to read the manual and who does that? And if you don't know the feature existed, you wouldn't even know what to look up in the docs.

The hijacker isn't a passenger. The unit "remembers" which InfantryType hijacked it, but it doesn't remember the actual hijacker (and its health and other properties). This means the hijacker would have to use a custom mechanism to eject (and the game needs to be fooled to detect this situation). Then the newly ejected hijacker would have full health again. Thus ejecting is not just getting one passenger out.