Jagger feigned a laugh at the other agent's handler's remark. "Almost wish I was unconcious for that one," it probably wasn't the best time to try to make light. He didn't have enough energy to keep it up for long.
"Don't worry. I heal," he was trying to make Argus worry about him less. Although he stopped trying to sit up more than he already was.
He was looking off at the other wall until asked about his serial number. "What? I'm not caught behind enemy lines," he was confused about why that was important.