I cannot believe the total and utter crap posted by so-called topman999.
If you were completing a OEI approach in a twin jet ac at 600 ft on final, what possible excuse could you imagine for some dumb idiot moving onto the RW and blocking it - even if a highly dubious air trafficker cleared the movement.....
A late-notice go-around at a critical phase of an emergency is an extremely tricky manoeuvre. I'm not surprised that the Lear had an accident as a result.
Any pilot who thinks that lining up in front of an aeroplane carrying out an emergency approach is in any way acceptable simply doesn't deserve to hold a pilot'slicence of any sort.
Please NOTAM any flights in which you may be involved, topman999, so that the rest of the civilised world can arrange to be elsewhere at the time.