At the same moment, Ginny reached out to grab Harry's hand, the one he had so conveniently put behind his back for her. Ron was already holding on to her, and when the Portkey activated, she felt herself being yanked forward. She hated Portkeys.
Especially when they deposited her flat on the ground, legs half-sticking out from the invisibility cloak. She didn't even want to know how Ron fared. Oops.