How to get the She's on Fire achievement without actually being good at slime ball.
She's on Fire Achievement Guide
You ever play basketball and wish it wasn't against the rules to climb up directly above the hoop and punt the ball down into it? Well, in real life, it is against the rules, but it's definitely not when you're stranded alone on a planet filled with goo animals! In this guide, I will teach you how to pretend you're good at basketball with at least 50 unsuspecting balls of sludge.
Here's how you do it:
Get a bunch of slimes off of the ranch, at least 50.
Go to area south of the ranch with the cracked arches and place your slime ball hoop in the slot across from one of the arched pillars.
Use platforming and jetpack to jump up onto one of the arches and look straight down into the hoop.
Shoot the slimes straight into the hoop. Go nuts!
In this case, when the "She's On Fire" achievement pops, it may be referring to how Beatrix LeBeau's pants have magically caught flame.