The economic boom and the “speculative orgy” that pervaded the Roaring Twenties faded abruptly during late October 1929 with the stock market crash (sometimes called the “Great Crash”) that precipitated the rise of The Great Depression.

to scald the hand

One can argue in favor of some substantial degree of concertedness, which means that the second methylene group has been partly rotated before the rotation of the first group is complete.

In that state he is called a ‘Buster’, bursting his shell.