I'm not sure if it was the moment when it all became inevitable, but it was the day that proved Sherwood was a chancer and out of his depth.
Sherwood gets plenty of flak on here (plenty of it justified) but that game we played really well for an hour (outplaying that seasons champions) and the goal Gil scored was fantastic.
Some of the spells in games we had under Sherwood we looked a very decent side going forward (Palace away just before we had another decent half but couldn't score and then defensive errors killed us).
Of course it all fell apart from that day and our league form collapsed.
Edit: Just realised Kante didn't start for them that day and he came on at 0-2. Probably as crucial for Leicester not just winning the game but getting him integrated into the team.