臨場

to be at the scene (sitting for an exam, performing, competing, giving directions etc) / firsthand (experience) / impromptu (remarks etc)

to face / to overlook / to arrive / to be (just) about to / just before

threshing floor / classifier for events and happenings: spell, episode, bout

large place used for a specific purpose / stage / scene (of a play) / classifier for sporting or recreational activities / classifier for number of exams

the feeling of actually being there