Due to a massive rowdy crowd, failures in security and some stupid decisions (selling beer in glass bottles at a gig? What is this? Bob's Country Bunker?) the system had failed and the threat was real. Megadeth were sweating bullets when a "stampede" broke through a security barrier, crushing numerous people and leaving a Paraguayan woman injured. Several of their crew were injured due to thrown bottles. MegadavE opted to disconnect and pulled the plug several songs into the show.

Dave, not known for holding back his opinions, was not silent with his scorn. He took to Twitter to announce the cancellation:

Dave Mustaine ‏@DaveMustaine 22h22 hours ago
Dear Paraguay, after all three barricades broke and hundreds of fans crushed three security guards, almost killing one female fan, we (1/2)

Dave Mustaine ‏@DaveMustaine
Regretfully had to cancel the show. Please understand that your safety is just as important as ours and after all the security went in (2/3)

Dave Mustaine ‏@DaveMustaine
The pit someone ran onto the stage, a bottle was thrown, and we'll let you know as soon as we can reschedule and come back. Lo siento (3/4)

Dave Mustaine ‏@DaveMustaine
This is out of our hands and we will make sure when we return to use a different venue, security, and promoter. Again, Lo siento mucho.

So here's what we know:
1 - I know what you are thinking and, no, I had nothing to do with this. Honest!
2 - MegadavE's Spanish is possibly better than mine. He was here for a couple hours.
3 - They will return to play a new venue with a different promoter in the future. They had played here before without incident.
4 - Symphony of Construction - while here Dave took time to catch the premier of LandfillHarmonic with the Recycled Orchestra. IF you don't know what that's about, check it out. It's awesome. It really is worth your time.

Source:	interaksyon.com
Band profile:	Megadeth
Event:	Megadeth: Dystopia South American Tour 2016