The Jetstar flight in Melbourne referred to was the result of attempting a TOGA tap (pushing the thrust levers to TOGA momentarily then pulling them back to the climb detent to prevent overspeeding from too much thrust). They didn't actually hit TOGA and their company procedure at the time was to check for positive rate and call gear up before checking the FMA. As a result the aircraft was still in Land Mode. The 777 is quite different in that TOGA commands a maximum of 2000' per minute so no issues with too much power.