This uncle physically pushed a female passenger, verbally threatened to slap her. Then when he realised someone took his video, he changed his tone and started and repeatedly explained what was going on.
His famous word was, "I slap you you know ah/oh".
Oh ya, he also pushed the female passenger at the buttock area (from what I gather). It's interesting to see that most other passengers were not getting involved. They were probably waiting for the quarrel to get really ugly before intervention/help (from what I gather).
I couldn't find the video link to share (by Emilianay Eng). Just got the snapshots.