The properly executed sidestep, as your opponent realizes he has been stepped and is traveling past you, almost in slow motion, but best he can do is pat you on the back as he sails past you leaving acres of open space to run into.
Other great highs…shedding your boots and going kaalvoet after first trying those clogs that pin you to earth….actually making a drop kick….the old collar tackle on a flying wing, now banned. I’m sure those that labor in the scrum have different, more basic highs.
Worst feeling in rugby ….I suppose missing a kick you should have made. But for me the worst feeling is getting ankle tapped when you were sure you were going to score a try. Again your mind is telling you all you have to do is run but you can’t even though nobody is stopping you.