Fun Crazyhouse tactic

Just now, I played a fun game of crazyhouse

I had a fun tactic in the end, a winning tactic, yes, I made some bad moves in the game

But, nonetheless, a funny tactic:

Use a rook, and a queen to checkmate.(by placing it on a square)

Here is the game: https://www.chess.com/analysis/game/live/5966697821