Mankato (KMKO)-Formal charges have been filed against a 26-year-old man accused of pulling a knife on someone during a dispute in Mankato early Friday morning.  Nathan Vickers fought with police while being arrested.  He faces numerous charges, including felony counts of second degree assault, fourth degree assault of a police officer, terroristic threats and drug possession.  Vickers remains jailed as he awaits his next court appearance.