good timing

(When a train arrives at a subway station, it brings a gust of wind because it pushes the
air. I have to use that as a sign.)
This was not a definite answer.
If he was wrong and messed up his timing, he could fall down in front of the train.
In fact, he was not sure he would be fine even if he did land perfectly on the roof of the
train.
He had no choice but to entrust his life in something he knew almost nothing about. The
overwhelming pressure of that fact made him want to roll over and give up right then and
there. He had no safer plan and the situation would only grow worse as he tried to search
for one.
He heard a low rumbling.
His throat grew dry.
He waited one, two, three seconds.
And then it came in an instant.
Something filled his vision. A clunking roar struck his ears a moment later. He was too
late. And by the time he realized that, the five-car train had already disappeared into the
other tunnel. If he had dropped down that time, his body would have slammed into the
track.
An unpleasant sweat spread across his entire back.
He could tell his breathing was gradually growing erratic.
“…”
(I know the timing now. To a certain extent. It comes five seconds after hearing the wind.
After five seconds, the train passes by. If I throw myself down with that timing, I should
land on the train’s roof.)
Fortunately, there was not a long gap between trains.
After a few minutes, the next train came.
He waited.
And this time…
Just as the train arrived, Kamijou Touma forcefully jumped down from the duct.
A metallic thud exploded out.
Kamijou had safely fallen on the roof, but a tremendous force caused his body to spin like
a top the instant his body touched it. Finally, his hip struck a protrusion similar to an
external air conditioner. He cried out as intense pain ran up his spine and he reached out
to grab onto the protrusions of the train’s roof in a desperate attempt to not slide off.
The five-car train instantly entered the tunnel.
“Gh… Pant pant!!”
He caught his breath and somehow put up with the pain as he lay on his back.

- New Testament Volume 8 Chapter 3 Part 9