It happens too fast for Pearl to process, much less for her to stop it -- she only has time for an ungainly shriek as her body's yanked into the water.

"G-Garnet!" Her head snaps up to look at her. Garnet's grinning, and Pearl's stunned face quickly gives way to a scowl of indignation as the realization sets in. "You-- ugh!"

Her hand connects with her clearly-unharmed shoulder in reprimand, producing a thwap. "I was worried!"