diff --git a/src/spfx.c b/src/spfx.c
index be29c70..e4fab07 100644
--- a/src/spfx.c
+++ b/src/spfx.c
@@ -145,11 +145,17 @@ void spfx_add(int effect,
 
 void spfx_clear(void) {
   int i;
+
+  /* Clear front layer. */
   for(i = spfx_nstack_front-1; i >= 0; i--)
     spfx_destroy(spfx_stack_front, &spfx_nstack_front, i);
 
+  /* Clear back layer. */
   for(i = spfx_nstack_back-1; i >= 0; i--)
     spfx_destroy(spfx_stack_back, &spfx_nstack_back, i);
+
+  /* Clear rumble. */
+  shake_rad = 0;
 }
 
 static void spfx_destroy(SPFX* layer, int* nlayer, int spfx) {