Finally it moved away, back the way it had approached him, and he sent out a beacon. Hopefully the sentinels would pick up the trace, find out where it got in and allow him or the others on the team to analyze the breach later. If it was the only one that had got through that is. Otherwise the sentinels would be closing down the border and the system shortly. Maybe he would have time to finish the test. He was almost halfway when it came at him, so he prepared to go the last bit before tracing his steps back.
...and he said sometimes things just happen. But sometimes they don't