When the station became "unstuck" in time, the worker - like the rest of the station's crew - began experiencing time-flashes, moving forward and backward in time. What he saw in his time-flash disturbed him, causing him to fly off in a panicked state, running to the docking bays to find a way off the station.
When Babylon 4 reappeared, Sinclair, Garibaldi, and a handful of others boarded the station to investigate. When they entered the cargo bay, the panicked man began firing shots at them and called them "monsters" and said, "I see you... you think I can't?"
He was stopped by Garibaldi, who flanked him while Sinclair was a distraction. They were quickly joined by Major Lewis Krantz who took the man into custody.