Fortunately for River, someone did all but jump out at her and it was also a familiar face... but unfortunately not a face that was familiar with her.

"Oh, hello! Sorry, I didn't see you there, rather more concerned about the impending explosion." Smiling brightly, Eight grabbed for her hand and started jogging towards a rather more sturdy structure. "Perhaps we should get behind something safer? Before--"

There was a distant click and immediately he made to push her behind the wall, hoping to get at least one of them to safety as the explosion behind them send glass and debris flying everywhere.