I hear nice people fight like monsters is this true ?

I'm a prime example.

There's a lot of repressed shit behind a nice person's smile, do your best not to to dislodge it, for hell cometh after.

I'd disagree.

Nice people try to be amicable.

"[i]seemingly"[/i] nice people are the ones you need to be careful of ....they will go all vengeance when nobody else is looking .

Sure sometimes them and the quiet kind of peeps can be real natural fighters can't always judge a book by its cover thing

Oh like me. I'm nice but when the gloves come off I can be nasty as can be

What does this mean like a physical fight?