Race Comment Explainer

Original comment with matches highlighted:

in rear, some headway after 4 out, not fluent 3 out, dropped to 2 out, soon

Matched phrases & meanings

Phrase	Meaning
not fluent	The horse jumped the tenth fence/hurdle poorly or awkwardly
tailed off	A definitive statement that the horse was finished and effectively out of the race
Headway	The horse was moving up through the field.
Rear	Running near the back of the field.

Summary

The horse jumped the tenth fence/hurdle poorly or awkwardly
A definitive statement that the horse was finished and effectively out of the race
The horse was moving up through the field.
Running near the back of the field.