LX Swiss A330 and AA poss 757 in VERY near miss at MIA

[jcb354]

I am based at MIA working on the scummy part of the business - cargo.
On leaving the office this evening (1735) a Swiss A330 and an American Airlines 757 or poss 737 were involved in a VERY near miss.
My view was from the south, and both aircraft were climbing and at approximately at 200 feet, same altitude, side by side.
The AA veered South at around 500 feet, the Swiss veered North at the same time.
Having checked schedule, the Swiss was due in 25 minutes before, so I can only assume that it was on a "go round", however I am dying to know how the hell they were both on the same runway, same altitude side by side.
At the time, inbound aircraft were landing on the southern runway at MIA...........not the northern.....
Anyone got any clues, because I tell you what - just the sight of them so close scared the living s**t out of me!
Would be glad to hear anything anyone knows!!!