diff --git a/chai.md b/chai.md
index d5f3db3e8..18ebf4691 100644
--- a/chai.md
+++ b/chai.md
@@ -84,6 +84,9 @@ layout: default
 
       .exist
 
+    expect(-> ...)
+      .throw /not a function/
+
 ### Chai-jQuery
 
     global.jQuery = ...;
diff --git a/ffmpeg.md b/ffmpeg.md
index 8c726ef19..7ee2bb158 100644
--- a/ffmpeg.md
+++ b/ffmpeg.md
@@ -24,12 +24,20 @@ layout: default
     -ac 1            # audio channels (1=mono, 2=stereo)
     -an              # no audio
     -vol N           # volume (256=normal)
-    
+
+    -acodec
+    -vcodec
+
 ### Ringtone conversion using ffmpeg
 
     ffmpeg -i foo.mp3 -ac 1 -ab 128000 -f mp4 -acodec libfaac -y target.m4r
 
-### To webm
+### To web
 
-    ffmpeg -i input.mp4 -vcodec libvpx -acoder libvorbis output.webm
+    ffmpeg -i input.mov -vcodec h264 -acodec aac -strict -2 output.mp4
+    ffmpeg -i input.mov -vcodec libvpx -acodec libvorbis output.webm
 
+    <video width="320" height="240" controls>
+      <source src="movie.mp4"></source>
+      <source src="movie.webm"></source>
+    </video>
diff --git a/jscoverage.md b/jscoverage.md
index 13368c16b..5e7a0f44e 100644
--- a/jscoverage.md
+++ b/jscoverage.md
@@ -16,7 +16,8 @@ Set up the `coverage` task so you can do `npm run coverage` later.
 ### test/setup.js
 
 Instead of requiring `YOURFILE.js`, use `-cov.js` when it's necessary.  It's
-preferred to do this in the test files (rather than the main entry points).
+preferred to do this in the test files (rather than the main entry points) so 
+not to mess with browserify.
 
     var cov = (!! process.env.COVERAGE);
     global.Mylib = require(cov ? 'mylib' : 'mylib-cov');