GR translation: jolts over a set of surprise points

[David Morris]

Highly technical jargon relating to plane acrobatics, like almost every
word in the second half of this paragraph.  Not translatable into
non-flight jargon in any language without becoming deadly technical, unless
your language has such colorful parallel jargon.

David

On Monday, August 24, 2015, Mike Jing <gravitys.rainbow.cn at gmail.com> wrote:

> V619.16-32   Well, it’s an older Jug, one with a greenhouse canopy. The
> barred field of sight gives Pirate twinges of memory in his neck muscles.
> The plane seems permanently out of trim to him, though he still fiddles now
> and then with different tabs. Right now he’s trying the War Emergency Power
> to see how it works, even though there seems to be no War, no Emergency,
> keeping an eye on the panel, where RPMs, manifold pressure, and
> cylinder-head temperature are all nudging their red lines. He eases it down
> and flies on, and presently is trying a slow roll over Celle, then a loop
> over Brunswick, then, what the hell, an Immelmann over Magdeburg. On his
> back, molars aching in a grin, he starts his roll a hair too slow, just
> this side of one-thirty, and nearly stalls it, jolts over a set of surprise
> points—finish it as an ordinary loop or go for the Immelmann?—already
> reaching for ailerons, forget the damn rudder, a spin isn’t worth worrying
> about . . . but at the last second does give the pedal just a touch anyway,
> a minor compromise (I’m nearly forty, good God, is it happening to me too?)
> and rolls himself upright again. It had to
> be the Immelmann.
>
> What are "surprise points"?
>
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