I would say that, YES, this one is just as bad with what can go wrong. I refer to it not as a Barking Dog demo, but as the Whoosh Bottle demo. I do not nor ever would I do it as described in either one of the links you have given. See an example of one of many things that can go wrong here and you will understand: https://www.youtube.com/watch?v=yYj0U9AMBZc. I would NEVER do this at a grade school as I would not be able to meet all of my safety precautions in such a setting.
Laboratory Manager/Adjunct Lecturer/Chem Club Co-Advisor
Department of Chemistry & Biochemistry
University of Michigan-Flint
Flint, MI 48502
From: DCHAS-L Discussion List [mailto:dchas-l**At_Symbol_Here**med.cornell.edu]
On Behalf Of Patrick A Ceas
Sent: Wednesday, April 27, 2016 3:11 PM
Subject: [DCHAS-L] "safe" barking dog demo
Just a quick yes or no, please. Would you lump the "Safe Barking Dog Demo" in the same category as the Rainbow Demo & Tornado Demo (i.e., it is an open flame demo, where additional flammable fuel -- let's say 95% ethanol -- could be added to an already confined ignited situation, therefore it is not prudent to perform, especially at a local grade school). We are having a discussion about it.
Here are two links that show/explain it:
Patrick A. Ceas, Ph.D.
Chemical Hygiene Officer
312 Regents Hall of Natural Sciences
St. Olaf College
Northfield, MN 55057
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