Those Gruesome Fortune Cookies
In both the book and in It Chapter Two, the Losers' reunion dinner at a local Asian restaurant ends with a horrifying final course that will make you think twice before ever reaching for a fortune cookie again. However, the contents of those cookies change between the book and the film. The cookies in the book contain manifestations of specific fears and concerns of each of the Losers — blood for Beverly, an eyeball for Richie, a cricket for Eddie, a fly for Bill — showing just how far It has already gotten into their heads.
In the movie, there are actually two rounds of disturbing fortune cookies. The first seems normal, until the Losers realize each fortune consists of only one word. Piecing them together, the fortunes form the sentence "Guess Stanley Could Not Cut It," which is how the Losers learn of the death of their friend, who committed suicide after receiving Mike's call asking him to return to Derry. In the book, Mike already knew about Stan and informed the Losers of his tragic fate over dinner.
Once this first unsettling fortune has been delivered, the remaining cookies in the bowl begin to shake, bursting open on their own to reveal grotesque — yet unspecific — monstrosities, including a bulbous insect with the head of a baby, a crawling eye, a one-winged bat, and a twisted half-formed bird. The bowl then fills with what appears to be acid blood, overflowing and spreading across the table, until the waitress arrives and it all disappears.