diff --git a/10-seq-hacking/vector_v5.py b/10-seq-hacking/vector_v5.py
index cf327bc..59f598e 100644
--- a/10-seq-hacking/vector_v5.py
+++ b/10-seq-hacking/vector_v5.py
@@ -269,15 +269,24 @@ def angles(self):  # <3>
         return (self.angle(n) for n in range(1, len(self)))
 
     def __format__(self, fmt_spec=''):
+        ellipsis = ''
+        limit_num = len(self)
+        if fmt_spec.endswith('*'):
+            fmt_spec = fmt_spec[:-1]
+        elif len(self) > 30:
+            limit_num = 30
+            ellipsis = ', ...'
+
         if fmt_spec.endswith('h'):  # hyperspherical coordinates
             fmt_spec = fmt_spec[:-1]
             coords = itertools.chain([abs(self)],
                                      self.angles())  # <4>
-            outer_fmt = '<{}>'  # <5>
+            outer_fmt = '<{{}}{}>'.format(ellipsis)  # <5>
         else:
             coords = self
-            outer_fmt = '({})'  # <6>
-        components = (format(c, fmt_spec) for c in coords)  # <7>
+            outer_fmt = '({{}}{})'.format(ellipsis)  # <6>
+        components = (format(c, fmt_spec)
+                      for c in itertools.islice(coords, limit_num))  # <7>
         return outer_fmt.format(', '.join(components))  # <8>
 
     @classmethod