SSH escape sequences

A lot of people don’t know that ssh has a number of escape sequences that can be run. I’ve often used the ~. to kill a stuck session but I recently discovered, by mistyping the aforementioned option, there is a number of other useful options too:

Supported escape sequences:
  ~.  - terminate connection (and any multiplexed sessions)
  ~B  - send a BREAK to the remote system
  ~C  - open a command line
  ~R  - Request rekey (SSH protocol 2 only)
  ~^Z - suspend ssh
  ~#  - list forwarded connections
  ~&  - background ssh (when waiting for connections to terminate)
  ~?  - this message
  ~~  - send the escape character by typing it twice
(Note that escapes are only recognized immediately after newline.)