in action

US /ɪn ˈækʃən/
UK /ɪn ˈækʃən/
"in action" picture
1.

beraksi, sedang beroperasi

doing something or operating, rather than being still or inactive

:
It's great to see the new machine in action.
Sangat menyenangkan melihat mesin baru beraksi.
The coach likes to see his players in action during practice.
Pelatih suka melihat para pemainnya beraksi selama latihan.