Perfect controlled demolition of twin chimneys - video

[Toolmaker51]

Could have looked that his tracks were on the bridge foundation. Lemme see......is the arched structure reinforced, tied into what is beneath me? Seems like I'd have hammered the arch barely beyond the vertical bulwark. I'll bet the collapse would progress almost identically, and no bigger crane trolling to get me out.
But I'm no EO, what do I know...