Remix of "Bombs for Throwing at You (Four Part Plan)" from Portal 2, by Gaetano De Paola (Gaetano96).
By the way, if you wonder, this remix is completely free! You can download it and make whatever you want with it, but if you repost it online, you can put my name on it... If you want to help me.
...Or not, I'm not gonna judge you if you don't. I'm just saying... ;)