Seeing as how the guy has an infinite toolset and apparently way too much time on his hands, you'd think he'd get more creative than doing the dominoes thing over and over with different materials. Plus, the proximity mines just feel like cheating.
Plus one star for the time this must have taken to set up.
This would have been easier to setup in real life.
To achieve it without a single "fuck you GMod" glitch is quite staggering.
All my stars for this video.