What are you trying to do here?
Yes there are ways to stall the 777 if you REALLY WANT TO?
While handflying the A/C during descent using FLCH why would you level off
BEFORE the MCP ALT then
NOT BOTHER TO SELECT ALT HOLD? You know that the speed will decay if you don't.
While you at it why don't you try a barrel roll too
The A/C FBW will object BUT you could still do it with your flying skill I'm sure!!
There will invariably always be holes in the swiss cheese, just try not to knowingly line them up ok?