Infinite Undiscovery is a JPRG with a petrification status ailment. Victims turn grey and have a light stone texture to them. Victims are only temporarily transformed: If their time as a statue is allowed to run out without helping them, they instantly return to human form and faint.
Infinite Undiscovery is a 2008 action role playing game for the XBox 360. As is common in RPGs, it features petrification as a status ailment. While this is normally infected on your party by monsters, you can equip an item that causes petrification to one of your characters, then hit a mushroom to purposely confuse yourself, at which point you'll use the petrification attack against your partners. This can be used to get unusual statue poses.
Screenshots taken from GansekiKawaru's videos.