Quote from Mr. P. Kiwi on November 5, 2011, 11:06 am

I see some of the dynamic props in the co-op maps can be highlighted when 'ping'ed. These are always the telescope panels, cube droppers, button and fizzler models. Is there a way to be able to make it ping other models, like tubes? Or can only these object be 'ping'ed?

I tried making things prop_dynamic, that doesn't work. Any ideas?