'jump for' versus 'jump in' or 'jump on'

[Deonisius]

English Grammar Tests, Elementary Level

ESL/EFL Test #82 "Prepositons Test", question 9

As soon as Bob heard his boss coming, he jumped ......... his chair and prentended he was working.

(a) inside
(b) under
(c) for
(d) down

English Grammar Tests, Elementary Level

ESL/EFL Test #82 "Prepositons Test", answer 9

As soon as Bob heard his boss coming, he jumped for his chair and prentended he was working.

Correct answer: (c) for
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Hi, I didn't understand why we use jump for a chair?
Why not jump in or jump on, for me it's more comprehensible, can you help me?

Deonisius

[Mister Micawber]

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The miscreant was elsewhere, Deonisius-- perhaps gazing out the window-- and jumped for his chair (i.e. with the desk chair as his goal) when he heard his boss coming.
.
_________________
Native English teacher at Mister Micawber's

[Seanmen]

Hi,

Could I say "jump down his chair"?

[Mister Micawber]

.
Nope.
.
_________________
Native English teacher at Mister Micawber's