What does 'go wild' mean?

English Language Tests, Intermediate level

ESL/EFL Test #732 [color=blue]“Grammar Tutorial: Avoid Verb Tense Shifts (1)”, question 2

He shoots the puck into the net and the fans wild.

(a) go
(b) have gone
(c) going

English Language Tests, Intermediate level

ESL/EFL Test #732 [color=blue]“Grammar Tutorial: Avoid Verb Tense Shifts (1)”, answer 2

He shoots the puck into the net and the fans go wild.

Correct answer: (a) go

Your answer was: [color=red]incorrect
He shoots the puck into the net and the fans have gone wild.
[size=200]_________________________[/size]

sorry, but i don’t understand the meaning of the sentence yet,plz explain for me, and why use this word "go
" here?

‘go wild’ is an idiom meaning ‘become very excited’.