-const int ANIMSTATE_DEAD1 = 1; // base frames: die1
-const int ANIMSTATE_DEAD2 = 2; // base frames: die2
-const int ANIMSTATE_DUCK = 4; // turns walk into duckwalk, jump into duckjump, etc.
-const int ANIMSTATE_FROZEN = 8; // force idle
+const int ANIMSTATE_DEAD1 = BIT(0); // base frames: die1
+const int ANIMSTATE_DEAD2 = BIT(1); // base frames: die2
+const int ANIMSTATE_DUCK = BIT(2); // turns walk into duckwalk, jump into duckjump, etc.
+const int ANIMSTATE_FROZEN = BIT(3); // force idle
+const int ANIMSTATE_FOLLOW = BIT(4); // also force idle