I was based at Kai Tak for a few years. One of the most scary things I ever saw:
I was waiting in dispersal in my SAR S-76 for departure clearance, looking northwest towards the checkerboard. The cloudbase was low, marginal for the approach, with a very even layer of cloud with good visibility below.
A (KA) 747 was on the IGS. The tone of their radio calls made us think that the pilots were finding it hard going. Nothing was seen of the aircraft when suddenly, the call "Going round!" was made.
At that moment, the port wing and No.1 engine (only) briefly appeared below cloud; the aircraft was very low and was rolling left. It should have been rolling right. The wing then disappeared back into cloud! This meant the aircraft was turning towards the steep, high hills just to the north of the airfield instead of carrying out the correct missed approach procedure, which was over the runway and out through the gap.
Mt finger was going for the transmit button but ATC were very quick off the mark and gave them a very terse warning! After a few intense moments they obviously got it sorted out but they flew well north of the runway. For a while we all held our breath because we thought we were about to witness a major disaster.