Sign was a distinct language with regional variations, and dialects. There were differences between British and American Sign that would make communication difficult, awkward, and challenging, but John understood her hands just fine. He nodded his agreement. Most people didn't want to die, it was human nature to want to survive.
He hadn't realised he would be putting his life in danger by going out. All he wanted to do was pick up some food and get to Nathaniel's place. He'd be content to hang out there, away from this madness. Fate seemed to be against him at the moment. Whether or not the threat would be gone by the end of the day, it was an active threat now, and John was out in the open, exposed and vulnerable.
He really, really didn't want to die. Not today. Not any time soon. He had a lot of living yet to do. Besides, as frustratingly annoying as his dreams had become, he wanted to see what happened next. So, in the interest of self preservation, he ran toward Clara, buying into the old saying that there was safety in numbers.