[jmj42]

> doing this stunt in what looks like a suburban park strikes me as shockingly irresponsible.

It look like an R/C air park, actually. I live near the headquarters for two large hobby companies (Hobbico - makers of RealFlight, mentioned elsewhere, and Horizon Hobbies). One of the two (I don't remember which) built a similar air park specifically to provide a location for flying R/C jets.

The R/C club is out flying jets most warm weekend days. See it here: https://www.google.com/maps/@40.0591456,-88.5519564,366m/dat...

[mcbain]

This is where they are flying:

http://mvc-apollo68.nl/ https://goo.gl/maps/hYYQg

That's somewhat uninhabited for The Netherlands.

[matheweis]

This. You can see what appears to be a dedicated dirt runway at 1:27.