Is it bad practice to throw errors without handling them or just bad practice to throw them period? I happened upon your comment and I ended up searching the internet for clarification :)

Dont forget to remove the comments in the initial solution editor. Hopefully you don't do what I did and pushed the comments, "//Your Code Here", to the next line instead of completely removing them thinking it was an SQL comment and then proceeded to submit the solution, it's not an SQL comment. :)
Since I pushed it to the next line, it seems like the interpretor processed my insert then silently or gracefully exited afterwords without processing the subsequent SELECT statement at the bottom. I was bamboozled for a bit, more than I'd like to admit.

// Your code here (not an SQL comment; the interpretor will error out--hopefully not silently)
vs
-- Your code here (SQL comment the SQL interpretor will skip)

My Example:

SELECT
'Dont forget to remove the forward slash comments below when you do the insert'
FROM participants;

//Your Code Here

SELECT * FROM participants;

It was magic to me until you gave a detailed explanation. Thanks for that!