1. The rule that keeps on giving
Not one round has gone by this year without something new to discuss in regards to the new ruck rule, which bans the 'third man up' and leaves players having to nominate. There's been criticism, confusion, free kicks, tactics – and now incredulity. Social media went into meltdown, possibly prompted by Channel 7 commentary, as the three umpires made a more concerted effort to ensure players were aware who the nominated ruckmen were. Past players Robert Shaw and Mick McGuane led the chorus of disenchantment, likening the situation to players being treated like Auskickers. But is it really the umpires' fault?
2. Much ado about nothing
Big disposal numbers are nothing new for Collingwood, which entered round four second in the competition with 412.7 per game. But St Kilda, ranked 17th in the first three rounds, joined the party on Sunday – starting with an enormous 109 in the first term to the Pies' 102, and ending with 418. Unfortunately, the possession ping-pong didn't lead to scoreboard impact. The Saints had 15 inside-50s for a modest 1.3 in that period, while Collingwood managed 2.6 from 18 inside-50s. The trend continued in the second quarter before the game finally broke open in the first seven minutes of the third term.
Match Report: Recap the ins and outs of our loss to St Kilda.
3. Drought-breaking Saints victory
St Kilda's scrappy win was not only its second straight this season – after starting with two defeats – but also the first time the Saints had inflicted back-to-back defeats on Collingwood since doing so in 2009 and 2010. The Magpies won the previous seven, including the 2010 Grand Final replay. Alan Richardson's side remains youthful and in transition, but was considered a finals contender on season eve. This win, on top of last week's victory over the Brisbane Lions, has put St Kilda back in the mix.
WATCH: Hear what Nathan Buckley had to say to the media post game.
4. Wayward goalkicking
The tone was set early and never improved, with the sides combining for 28 behinds compared to only 16 goals under the Etihad Stadium roof. That is awful, no matter how you spin it. Pressure played its part, but the misfiring was mostly down to the offending players as a series of set shots sprayed left and right. All-time great Leigh Matthews remarked after one straightforward set shot miss that it was the one area in which modern-day footballers had failed to progress.
5. Elliott back but short of a run
Tattooed Pie Jamie Elliott finally returned to AFL level after a back injury ruined his 2016 campaign and an ankle issue delayed his 2017 start. The popular forward started on the bench in his first match since round 23, 2015 and had to wait a while to run out. But Elliott sparked a huge roar when he clung onto a centering ball from teammate Darcy Moore midway through the opening term. His set shot drifted right and was his sole touch in the first quarter and he finished with only six on a quiet afternoon.