the N be -ing
The 'part' group
These nouns refer to a part or aspect of something
I suppose the low point would have to be falling off Superior Finish in the Grand National.
Bit and part are always preceded by an adjective, and thing usually is. This pattern is the adj N be -ing.
bit high point low point part thing turning point
In your past dieting endeavours, the easy part was losing the weight and the hard part was maintaining the weight loss.
The worst thing was telling the children.