Floating TV

I don't know if this is normal or not, but I found this TV floating in a pretty lake (aside from all the rubbish floating in the water, it IS pretty!). Do TVs usually float? I would imagine they would sink, but maybe the tube keeps it bobbing on the surface. Poor TV, somebody used to love you... come to think of it, somebody used to love me too. It's painful when somebody deserts you, isn't it, my new little buoyant friend...