“My friend phoned that he’s changing his name to ‘Spinal Column.’ I said, ‘Can I call you back?’”

To “call someone back” is usually not meant literally in those words, but there are jokes. This was posted on Twitter by Tom Fox on November 2, 2015:
   
“My mate rang to say he’s changed his name to ‘Spinal Column’. I said ‘Can I call you back?’”
   
   
Twitter
Tom Fox
@TomFoxTom
My mate rang to say he’s changed his name to “Spinal Column”.
I said “Can I call you back?”
10:15 AM · Nov 2, 2015·Twitter for Mac
   
Twitter
dave sutcliffe
@bigsutti
My mate rang to say he’s changed his name to “Spinal Column”.
I said “Can I call you back?
7:33 PM · Nov 3, 2015·Twitter Web Client
   
Twitter
Dan J
@Djlond
My mate phoned me to say he’s changed his name by Deed poll to “Spinal Column”.
I said “Can I call you back?..
5:30 AM · Sep 14, 2016·Twitter for iPhone
   
Twitter
Shit Jokes
@ShitJokes
My mate just phoned me to tell me he had changed his name by deed poll to spinal column. “Can I call you back?” I asked.
12:46 PM · Sep 21, 2016·Twitter for Android
   
Twitter
Afternoon Joke
@AfternoonJoke
My friend phoned to tell me he legally changed his name to Spinal Column. “Can I call you back?” I asked.
5:42 PM · Aug 25, 2017·Twitter for Android
 
Twitter
Bob Kostic
@causticbob
My mate just phoned me to tell me he had changed his name by deed poll to “Spinal Column”.
“Can I call you back?” I asked
4:55 PM · Sep 21, 2017·Twitter Web Client
   
Twitter
QT@Anon 🌟🌟🌟
@QTAnon1
My mate just phoned me to tell me he had changed his name by deed poll to “Spinal Column”. I replied…..“Can I call you back?”
10:50 PM · Nov 15, 2019·Hootsuite Inc.
 
Twitter
🤣 The Dad Joke Man 😉
@DadJokeMan
A friend ‘phoned to tell me he was changing his name to Mr Spinal Column.
I said ‘Can I call you back?’
#Dadjoke
1:28 AM · Jan 13, 2020·Twitter for iPhone