Add context-switching comic to Call Etiquette section

index.html

@@ -40,6 +40,7 @@ <h2 id="chat-etiquette">Chat Etiquette</h2>
 <p>Additionally, asking your question before getting a reply allows asynchronous communication. If the other party is away, and you leave before they come back, they can still answer your question, instead of just staring at a “Hello” and wondering what they missed.</p>
 <h2 id="call-etiquette">Call Etiquette</h2>
 <p>Don’t call someone out of the blue. Respect that your desired call partner might be busy and in <a href="https://en.wikipedia.org/wiki/Flow_(psychology)">flow</a>. Calling someone means you request immediate, full attention, interrupting any other activity. Some people like to probe with an initial “hello” to verify whether the presence status shown is true, hoping they can determine whether the recipient is near a device, then will immediately follow up with a call. Don’t do that either. If someone is able and willing to answer a chat message, it does not mean that they are also available for a voice or video call.</p>
+<img src="assets/context-switching.webp" alt="Focus - a comic about context switching">
 <p>Instead of sending a call probe, or asking “hey, do you have time for a call?” (which is better but not great), you can try something like this:</p>
 <pre class="text"><code>2020-07-08 12:32:12 you: Hi - do you have X min for a quick call to talk about XYZ? [etc...]</code></pre>
 <p>This does three things: it time bounds the request, it gives the recipient some context, and it helps you remember what you wanted to talk about if the recipient can’t or doesn’t respond until later.</p>

index.md

@@ -63,6 +63,8 @@ the recipient is near a device, then will immediately follow up with a call.
 Don't do that either.  If someone is able and willing to answer a chat message,
 it does not mean that they are also available for a voice or video call.
 
+![Focus - a comic about context switching](assets/context-switching.webp)
+
 Instead of sending a call probe, or asking "hey, do you have time for a call?"
 (which is better but not great), you can try something like this: