"Ohmygoodness!" Pinkie blurted. "A waterfall! Look, Applejack, a waterfall! Wowsers! I'mgonnajumpinraceyouthere!"
"Pinkie, what're you on about..." The next step revealed through a gap between the heavy trunks surrounding them, not far off the trail, a cascade of purple-blue. Its shush-shush reached out to her ears only then, as it must have with Pinkie, who was sprinting towards it.
The roiling shapes terrified her. Adrenaline surged; her ears rang and her barrel lurched and all she could see was Pinkie charging headlong and leaping towards the --
"Cannonball!"
"PINKIE!"
The moment Pinkie touched the water
the liquid spurted out around her, wrapping her limbs and barrel and neck
"Bow-bow-bow!"
pulling her in, swallowing her
"Bow-bow-bow!"
with a horrified shriek she was forever
"Wheee!" Pinkie splashed into the pool below with a cheer and beamed up. "What's that, Applejack?"
"Nothing can stop..." She shook her head, quivering, disoriented. "...What?"