Applejack to the Chimera:
Ya, thats right. Eat me, ya varmit, and leave mah sister alone. I hope you choke.
Mud parted as fireproof boots plowed through the waterlogged soil. Flames erupted around the occupant of said boots, bathing her, her sister, and their three-headed pursuer in intense yellow light. A claw shot out, swiping at the back of the boot-wearing pony, severing the straps of the saddle bag in the process.
She could not stop to retrieve it.
Hooves tore through swamp, echoed by paw-steps behind. The smaller pony pulled ahead; her lithe, tiny body was less inhibited by the swamp. She jumped left, barely dodging an eruption of fire. Her rear hoof landed in the exact spot where her elder sister expected to land after similarly jumping a split-second later. The elder, surprised by her little sister's sudden move, contorted so that she would land close to - but not on top of - the foal.
And in that single instant after landing in which Applejack was off-balance, the venomous serpent tail of the Chimera struck.