Both Cobes and Warlord were definitely acting sketchy. Warlord with his sunglasses manically tapping his phone. Josh is shaking, teeth clenched, and looking spacey. We all know how weird Josh is, but this had a different appearance.
For whatever reason, I don't see them popping pills together. Smoking or doing lines seems more likely. Why would they even open the window? Isn't it like 20 degrees in Casper? If it's not meth, then it's some sort of synthetic upper. Josh doesn't see a problem with spice, so I can see him trying bath salts or something stupid like that.