Dunking Sion's passive for 274g

I was playing Darius and I had a reset from my ultimate ability. I used it on Sion's passive to see what would happen and I happened to get an extra 274G for killing it with the ultimate itself. Steps:

1. Join queue and pick darius
2. Hit level 6, and kill (insert champion here, preferably :) ) with your ultimate ability.
3. Have Sion die from anyone, then use your ultimate ability to kill Sion's passive.