My logic of this Sonic.EXE: As for the Tails death, Sonic.EXE would touch Tails to tease him and watch him cry. Sonic.EXE would then tower behind him, ripping his Tails off, and biting off a chunk of Tails' head, as he would laugh maniacally. [done ] As for Knuckles' death, when Knuckles would make all of the illusions disappear and get tired wishing to have a rest for a bit, Sonic.EXE would Roll into him from behind as the screen cut to black and a bone breaking sound would be heard, implying Sonic.EXE broke Knuckles' back. [ gotcha ]