Katherine too late noticed the hand about to touch hers, and so was unable to stop it. As their fingers touched her eyes rolled into her head and she fell to the ground, lucky to not fall on the rock Pavel had tripped on earlier. She wouldn't have felt it till later either way since she was now lost in the flow of time.
The first thing she saw was Pavel, younger than he was now, shooting someone with a gun. She had no idea what was going on, but she would admit later that it frightened her. She next saw someone trying to take off his clothes. For some reason this one caused her a little annoyance. She wasn't entirely sure what that was. It wasn't like she had never seen someone doing things like this. Usually it only caused her issues when she saw Kristen with Haylie. Then another scene came to her, this time with Adri. She wanted to reach out and touch Pavel, but obviously that wasn't a possibility since she was only a spectator when she did this.
Her eyes opened, but for once she didn't move away from the person she had touched. She didn't think anything of this though. It would only be in retrospect that she would even realize that that was not normal for her.