Mike is the only member of the Losers' Club who remained in Derry, so therefore is the only one who remembers their childhood and the promise they made to defeat It if It ever came back. He calls each of the Losers, which jogs their memory. They all promise to return to Derry, well, all but one…
The scene opens with Mike reenacting the famous Old Spice commercial, as Isaiah Mustafa, who played adult Mike in It Chapter 2, was also the Old Spice Guy.