high 5?

   {𝕩¨ ↕𝕩}5  #q: can this be improved?
⟨ 5 5 5 5 5 ⟩
   ⥊˜5       # right: high-five!  left: low miss
⟨ 5 5 5 5 5 ⟩
   (⊢⊣¨↕)5   # synthetic operator: Tie Fighter
⟨ 5 5 5 5 5 ⟩
   (↕⊸⌈)5    # emoticon: sad guy
⟨ 5 5 5 5 5 ⟩

The Tie Fighter is also good for observing part of an evaluation with a side effect:

   1 + 2 + 3  # what is 2+3 though???
6
   1 + (⊢⊣•Show) 2 + 3
5
6
   # not needed in the case of •Show
   1 + •Show 2 + 3
5
6
   # and needs more parens than before-right
   1 + •Show⊸⊢ 2 + 3
5
6

breakup

   @‿@  # what are you smiling about?
""
   @⋈@  # did that question anger you?
""
   @-@  # come on, aren't we in a relationship?
0

(J) The 'diamond' pseudo-operator: <>

This is a way to transform a list of boxed strings into a box of a table of characters.

   ]l =: <;._1 '/the sun/rises in/the south'
┌───────┬────────┬─────────┐
│the sun│rises in│the south│
└───────┴────────┴─────────┘
   <LF joinstring l  NB. wrong!
┌──────────────────────────┐
│the sun rises in the south│
└──────────────────────────┘
   <> l
┌─────────┐
│the sun  │
│rises in │
│the south│
└─────────┘

BQN's stricter about fill elements:

   >"the sun"‿"rises in"‿"the south"
Error: >: Incompatible element shapes (encountered shapes ⟨7⟩ and ⟨8⟩)
at >"the sun"‿"rises in"‿"the south"

   {>(⌈´≠¨𝕩)↑¨𝕩} "the sun"‿"rises in"‿"the south"
┌─           
╵"the sun    
  rises in   
  the south" 
            ┘