Meaning of the mind boggles

[jorien]

Test No. incompl/elem-31 "Responses (4)", question 8

Mike: 'It's amazing when you learn what technology can do, isn't it?'
Jane: '.........'

(a) The mind trembles.
(b) The mind wobbles.
(c) The mind stumbles.
(d) The mind boogles.

Test No. incompl/elem-31 "Responses (4)", answer 8

Mike: 'It's amazing when you learn what technology can do, isn't it?'
Jane: 'The mind boogles.'

Correct answer: (d) The mind boogles.

Your answer was: incorrect
Mike: 'It's amazing when you learn what technology can do, isn't it?'
Jane: 'The mind stumbles.'
_________________________

What does "the mind boogles" mean?

[Alan]

Thanks for this. In fact it's a typing mistake and should read:The mind BOGGLES. This means: Thinking about it is quite terrifying - again said in a semi humorous/sarcastic way.
_________________
English as a Second Language
You can read my ESL story Word Story: Dictionary