The System Lord took a step to the side when something ran ice cold up and down the length of him. It was the sting by something new, foreign, and not entirely pleasant. He'd been around humans long enough to feel difference between a human,a Jaffa, and Goa'uld from a long distance. He could feel how they all occupied space, the reality they all lived in. His head swiveled instantly to the source.

Feeling the difference between a human and something completely new wasn't exactly hard when it offended the senses. His eyes landed on the Doctor and John Smith. It was coming from them. Sobek stepped closer to John, head sliding to the right like he was feeling for a current of air. These two were something he'd never encountered. The symbiote wrapped around Daniel's spine tightened further, shifting minutely away from them in response. These two were both there and not there, something that made him want to wipe them out and restore the order int he room.

He didn't know what it meant. Sobek had encountered a lot over his thousands of years. Never this.

Sobek reached down and sank his claws into the front of John's clothes, careless if he scored flesh with the metal, and ripped the front off, then pressed his palm against his chest.

Two different heartbeats.