[PAR35]

Were they trying for the collapse of downtown London?

Based on this comment, my guess is that you are not very familiar with the subways in London.

[montag813]

Based on this comment, my guess is that you are not very familiar with the subways in London.

Or with engineering.

[nopardons]

Based on what the poster wrote, he/she isn't familiar with much if anything.

[nopardons]

Based on what the poster wrote, he/she isn't familiar with much of anything.