diff --git a/generators/unrath.py b/generators/unrath.py
index c8f96e1..156edb0 100755
--- a/generators/unrath.py
+++ b/generators/unrath.py
@@ -36,7 +36,11 @@ class Unrath:
         shapesize = random.randint(2, 5)
         while len(self.shape) < shapesize:
             p = random.sample(self.shape, 1)[0]
-            self.shape.add((p[0]+random.randint(0, 1), p[1]+random.randint(0, 1)))
+            self.shape.add((p[0]+random.randint(-1, 1),
+                            p[1]+random.randint(-1, 1)))
+        minx = min(map(lambda p: p[0], self.shape))
+        miny = min(map(lambda p: p[1], self.shape))
+        self.shape = {(p[0]+abs(minx), p[1]+abs(miny)) for p in self.shape}
         self.shapewidth = max(map(lambda p: p[0], self.shape))
         shapeheight = max(map(lambda p: p[1], self.shape))
 
@@ -69,7 +73,7 @@ class Unrath:
                 else:
                     slow = unrath
                     fast = self
-                slow.speed = fast.speed * 1.1
+                slow.speed = fast.speed * (1.1 + random.random()/10)
                 slow.update(dt, True)
         if not collision:
             self.pos = newpos