What was too fast for others to notice was perfectly visible to Pietro, though he was left no less confused. No one could move at those speeds, no one but him, and certainly not any one who should be inside S.H.I.E.L.D..
He took off after the blur, pushing past the lovely secretary he'd been talking to, quickly catching up to the speedster, cutting him off with narrowed eyes. "Hey, what is this? One speedster per capita, shoo."