1.   My mind boggles at the amount of work still to do.

2.   The mind boggled, but there it was, every distressing detail.

3.   The sheer amount of data makes the mind boggle.

4.   The mind boggles at the possibilities that could be in store for us.

5.   The good grace with which they face the latest privations makes the mind boggle.

6.   Well my mind boggled with the iceberg and that.

7.   But it took such excruciating effort on their part -- every game was such a grind -- that the mind boggles at the thought of trying it again.

8.   Minds boggle at the naivete, not to say wrongheadedness, of his argument.

9.   My adolescent mind boggled.

10.   Once again, the mind boggles.