I can't stop running permutations. Millwall have got to play Palace midweek (they'll not fancy that) and then Derby away. If they lose both of those by a couple of goals each on average then even draws for Peterborough and ourselves would be enough to send them down (unless they score lots of goals in defeat in which case they'd have to lose by an extra goal). The form they're on and the way Posh and ourselves are picking up points, they must be bricking it too.
What if us and Millwall both end up on 55 points and minus 14 GD? Is it goals scored? A mascot fight? What?