"What?" Lestrade turned, trying to make out what had frightened the doctor without much success. "What have you seen?"
He stood on his toes in a small attempt to get a better view of the street, half expecting to make out the man Sherlock had claimed to be Moriarty, but John grabbed his wrist and made him turn round again.
"You've got to get me away from here!" The doctor's voice sounded anxious and Lestrade thought he could even see a hint of panic in his eyes.
For a moment he just looked at John, startled. Where was he supposed to take John? What was he running away from?
"Please!" John insisted, and Lestrade felt the grip around his wrist tighten. "Where's your car?"
"In the car park", Lestrade stated automatically.
"Then come on." It was obvious that it took John much effort to get to his feet and Lestrade could see him scowl at certain movements, unfortunately confirming his suspicions the doctor was injured.
John barely even managed to stand before his knees gave out, although luckily the DI had the presence of mind to steady him.
"Thanks", John murmured as he had acquired his balance again, and Lestrade carefully let go of him, staying on alert to catch him in case.
"I suppose my body is punishing me for not having eaten..." John apologized, a forced smile appearing on his face.
"How long has it been since you've had your last meal?" Lestrade asked worriedly, lowering his hands a bit as John didn't seem in danger to collapse right away.
The doctor frowned. "Way too long" he finally said, then, he shot a nervous look to the exit. "Which way to the car park?"
Lestrade directed vaguely to escalators and they started walking towards them, John casting anxious looks over his shoulder and Lestrade closely watching the doctor, as he was still afraid he could break down.
John indeed stumbled several times, but was able to catch his balance again without Lestrade interfering.
The DI also turned his head several times, hoping to get some idea of what was scaring John, but there were nothing but some town people rushing to get home and some tourist taking pictures. Nothing special for London, really. They had just reached the escalator as John suddenly stiffened; panic suddenly appearing on his face.
"Come on!" He hammered the button to call the escalator impatiently.
"What is it?" Lestrade asked, turning to the street again but John held him back.
"Don't", he hissed. "He might see you."
"Who?" Lestrade asked lowering his voice while trying to somehow get a look of the street without turning his head too much.
John didn't answer as the escalator finally arrived but drawled Lestrade in before the doors had fully opened.
John instantly hit the close-doors button but in the few seconds it took the doors to shut Lestrade could get a good view of the street:
There was Sherlock Holmes, his usually fast glance wandering, as if he was looking for something. Or rather someone.