My most negative comment also had a simley face, and can totally see that it's quite negative without it. It's pretty terse and sharp sounding.

*"Fitting all that into 7 minutes will likely lead to injury for someone who is in the audience for any kind of short N minute workout, IMO. I concur with your general sentiment and good intentions though. :)"

I wrote this a couple days ago though, and am a bit miffed because I would have expected to have written a more acerbic comment sometime in the past.