I’ve done this before. Example

I was going somewhere yesterday, the bank?, when I saw…

It’s also fun to interject bangs into sentences too

I was so convinced that I was going to die!, but I ended up just fine.

Ultimately, I feel that if language is descriptive and not ambiguous it is legitimate English.

En dash is very useful for

Dates (3–20–25)
Subtraction (although I think math script uses its own unique dash?) (7 – 1 = 6)
Value ranges ($20–40)

Then of course there’s the beautiful—and slightly different—em dash!