diff --git a/README.md b/README.md
index e0a53f6..7e1984d 100644
--- a/README.md
+++ b/README.md
@@ -215,6 +215,13 @@ tested for a number of scenarios, and used in a number of servers.
 Because of the inherently partial nature of testing, you are aware that this
 brings no guarantees that it'll work for your scenario.
 
+Careful yourself when working with ZFS snapshots! Check this out:
+
+    zfs destroy -r zroot@mysnap     # destroy snapshot 'mysnap' from pool 'zroot'
+    zfs destroy -r zroot#mysnap     # destroy all system data, and comment it's 'mysnap'
+    # notice that # and @ are next to each other on most keyboards.
+    # Sun made a poor choice, or they are adrenaline junkies.
+
 ## License
 
 Copyright (c) 2014-present, Michele Mazzucchi