diff --git a/lib/aviglitch/frames.rb b/lib/aviglitch/frames.rb
index 3d0bf04..ce88f65 100644
--- a/lib/aviglitch/frames.rb
+++ b/lib/aviglitch/frames.rb
@@ -137,6 +137,7 @@ def * times
       times.times do
         result.concat frames
       end
+      frames.terminate
       result
     end
 
@@ -177,6 +178,8 @@ def slice! *args
       tail = self.slice((b + l)..-1)
       self.clear
       self.concat head + tail
+      head.terminate
+      tail.terminate
       sliced
     end
 
@@ -200,6 +203,7 @@ def []= *args
 
       self.clear
       self.concat new_frames
+      new_frames.terminate
     end
 
     ##
@@ -343,6 +347,7 @@ def insert n, *args
 
       self.clear
       self.concat new_frames
+      new_frames.terminate
       self
     end
 
@@ -370,6 +375,13 @@ def == other
       @avi == other.avi
     end
 
+    ##
+    # Closes the internal temp file explicitly. This instance becomes unusable.
+    def terminate
+      @avi.close
+      @avi = nil
+    end
+
     ##
     # Generates new AviGlitch::Base instance using self.
     def to_avi