Rams burn own field with fireworks

[displayfireworks1]

Rams turf near end zone caught fire briefly from pregame pyrotechnics. Fire extinguishers used and now being cleaned.
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http://l3.yimg.com/bt/api/res/1.2/bRFD_fSgDtbZRHKOlGljVA--/YXBwaWQ9eW5ld3NfbGVnbztxPTc1O3c9NjAw/http://l.yimg.com/os/publish-images/sports/2015-09-27/5b663950-653b-11e5-acfd-510beadf3662_Screen-Shot-2015-09-27-at-1-14-35-PM.png

[displayfireworks1]

http://cdn-jpg.si.com/sites/default/files/styles/si_article_main/public/2015/09/27/rams-steelers-delayed-fire.jpg?itok=HotVnZ9R
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Anyone know what fireworks company shoots this stadium in St Louis?
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https://usatftw.files.wordpress.com/2015/09/usp_nfl__pittsburgh_steelers_at_st_76287982.jpg?w= 1280&h=898

[matandch]

Stuff happens.

[displayfireworks1]

I would be curious if the flame projectors use some sort of liquid flammable material?
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http://l1.yimg.com/bt/api/res/1.2/SQxRxmdUU8di8xyWZ4Cpdg--/YXBwaWQ9eW5ld3NfbGVnbztxPTg1/http://l.yimg.com/os/publish-images/sports/2015-09-27/bb351a40-6540-11e5-a112-c7f3a8955417_fire-overlay.jpg