bound in a repl thread to the third most recent value printed
user=> "Hello!"
"Hello!"
user=> "Hello World!"
"Hello World!"
user=> "Hi Everyone!"
"Hi Everyone!"
user=> [*1 *2 *3]
["Hi Everyone!" "Hello World!" "Hello!"]
user=> (range 5)
(0 1 2 3 4)
user=> (last *1)
4
user=> (last *2)
4
user=> (last *3)
4