Not sure why people are being asked for an opinion on this one as RED is the only right answer.
Both feet were off the ground. The rules say that is a straight red, regardless of how bad or otherwise you think it looked.
Simple.
If people want a debate about it...... (on here? surely not).....then the question should be "Do you think the red card rule for a two footed challenge is too black-and-white?"
Thank you.