You say what if (something) and you also answer someone's what if.
Example:
(Someone) what if you were a potato?
(Someone else) I'll be a couch potato, what if you were a lamp post?
Ok? Here we go
What if Minecraft came to life?
Example:
(Someone) what if you were a potato?
(Someone else) I'll be a couch potato, what if you were a lamp post?
Ok? Here we go
What if Minecraft came to life?