Off you go. To the side. A few metres down the runway.
I have trained this, and I have tried it in real life. My Effoh who was in the habit of not setting 40%, but rather just push the throttles up (that is the way we used to do it on the .... fill in the blanks) did exactly that, and hit TOGA without checking anything. The left engine worked as it should, the right was not. Not an engine failure, just slow.
The nose was pushed about 2 metres to the side before I managed to close the throttles. Maybe we managed to move 10 metres down the runway.
Playing glider in the sim is a different situation to doing it in real life, in darkness and without visual contact with anything.