diff --git a/src/collectable.cpp b/src/collectable.cpp
index d349d49..eea383a 100644
--- a/src/collectable.cpp
+++ b/src/collectable.cpp
@@ -235,7 +235,7 @@ void collectable_explode(collectables *collectable)
 
 	for (int i = 0 ; i < 10 ; i++)
 		explosion_add(RANDRANGE(collectable->x - 25, collectable->x + 25),
-			RANDRANGE(collectable->y - 25, collectable->x + 25), SP_BIG_EXPLOSION);
+			RANDRANGE(collectable->y - 25, collectable->y + 25), SP_BIG_EXPLOSION);
 
 	player_checkShockDamage(collectable->x, collectable->y);
 }
diff --git a/src/game.cpp b/src/game.cpp
index c525867..28d3480 100644
--- a/src/game.cpp
+++ b/src/game.cpp
@@ -1425,7 +1425,7 @@ static void game_doPlayer()
 			}
 
 			engine.keyState[KEY_UP] = engine.keyState[KEY_DOWN] = engine.keyState[KEY_LEFT] = engine.keyState[KEY_RIGHT] = 0;
-			if ((rand() % 3) == 0)
+			if (CHANCE(1. / 3.))
 				explosion_add(player.x + RANDRANGE(-10, 10),
 					player.y + RANDRANGE(-10, 10), SP_BIG_EXPLOSION);
 			if (player.shield == -99)