When you just follow discussion at LKML and see PONIES there!

Discussion about slow write to USB pendrives under new kernel.
And PONIES surfaced at this blogpost:

Prior to Ted Ts’o’s session on fsync() and rename(), some joker filled the room with coloring-book pages depicting ponies. These pages reflected the sentiment that Ted has often expressed: application developers are asking too much of the filesystem, so they might as well request a pony while they’re at it.
[...]
Actually, it was Josef ’Jeff’ Sipek who deserves the first mention of application programmers asking for pones, when he posted an April Fools patch submission for the new open flag, O_PONIES — unreasonable file system assumptions desired.