diff --git a/README.md b/README.md
index 326142f..676c0d3 100644
--- a/README.md
+++ b/README.md
@@ -976,6 +976,7 @@ looking at some distributions:
 | `:h bar` | `Ceci n'est pas une pipe.` |
 | `:h holy-grail` | `You found it, Arthur!` |
 | `:h map-modes` | `:nunmap can also be used outside of a monastery.` |
+| `:help!` | `E478: Don't panic!` (Glitch? When used in a help buffer (`buftype=help`) this works like `:h help.txt` instead.) |
 | `:smile` | Try it out yourself. ;-) Added in 7.4.1005. |
 
 ## Quirks