The last time Homer suffered a head injury at the power plant occurred in Large Marge.
Second time Declan Desmond made a documentary about Krusty Burger (which is a parody of the film Super Size Me). The first time was in 'Scuse Me While I Miss the Sky. Incidentally, both are name "Do You Want Lies With That?".
A drug lord refers Homer as 'pork and banana'. From 'banana' he seemed to be aware of him being yellow.
Goofs
In the school's playground scene, Report Card can be spotted at the top of the ladder behind the slide, but he has a yellow complexion.
Marge got upset when Homer applied his own one-liners to action film moments even though she applied her own one-liner in King of the Hill, where the hero breaks a bad guy's neck.