Gabe lures Tex away and into Tex's boat where he plans to shoot him with the foreshadowed flare gun. He misses and Tex starts to struggle with him as they charge into each other. And even though it is not shown, Gabe hobbles back to the house alive meaning he managed to kill Tex despite being in a cramped space and having an injured leg.
Jason managing to realize how Pluto mimics his movements, and walks him backwards into flames.
Adelaide's fight with Red, where the latter manages to dominate through nimble dodging and precise strikes.
To elaborate, shes not just dominating. Shes toying with Adelaide. It quickly becomes clear she could end the fight any time she chooses, and only lost due to well deserved confidence.
The fight also plays a good deal of foreshadowing into The Reveal at the end with Adelaide turning more feral as she tries to kill Red who remains in control throughout the fight.
On her end, Red whistling "The Itsy Bitsy Spider" before dying at her Tethered's hands amounts to her reasserting herself as the original by spitefully reminding the Fake!Adelaide she was just a clone.