When investors watched shares of Waste Management, (WM -1.22%) and Republic Services, (RSG -0.85%) jump in early trading Monday, they were probably excited as big moves are rare with these two trash haulers. It turns out the possibility of the two companies spinning off their land and property assets into a real estate investment trust (REIT) ended up being the culprit behind shares popping. In the video below, Motley Fool analysts Blake Bos and Isaac Pino discuss the possibility of such a spin-off. They'll also discuss if now is a good time to invest in these trash superstars, and what the investing thesis is behind the companies.