Thales successfully brings the snake the rest of the way from near-fainted to really-near-fainted, and your Pokeball quickly engulfs it in a burst of energy. It bops around a bit on the ground, but clicks shut soon enough.
SpoilerYou caught an Ekansssssssssssss!
Female, level 12
Ability: Intimidate
Nature: Hasty
HP 4
ATK 6
DEF 4 (-2)
SATK 4
SDEF 5
SPEED 6 (+2)
(At 1 HP, of course)
The remaining snake decides that it's time to cut and run...but it might not get very far.