That one person..

You know the one I mean!

You have just done something to the best of your ability, other people have said "well done!" and you are feeling on a bit of a high but then...

Someone 'kipper slaps' you right back down to earth.

I'm sure they don't mean to do it but it kinda' sets the tone for the rest of the day.

Usually this person will be quite close to you which makes it all the harder. I think the only way to deal with it is to smile and say "I'll do better next time"