Flight of fancy

And, whereas the mind of Man, when he gives the Spur and Bridle to his Thoughts, doth never ſtop, but naturally ſallies out into both extreams of High and Low, of Good and Evil, his first Flight of Fancy commonly tranſports Him to Idea's of what is moſt Perfect, finiſhed, and exalted; [...]

Who might not, by a very easy flight of fancy, have believed that everything about him took this haunted tone, and that he lived on haunted ground?

No German troops were mobilized along Canada's border last week, no Canadian cities had been bombed, and only by the remotest flight of fancy could alarmists see the Dominion as a battleground.

Aguilar-Millan et al. published an ambitious flight of fancy which explored the “post-scarcity world” of 2050 in light of technical advancements which they argue will decrease costs to providers until almost everything becomes free to the end user.