UNDO The Past, Anyone?

Just another random thought of mine tonight ...

At many a times, there were situations that I simply wished that I've the ability to "undo" them. Although, many decisions/choices have been made after much brainwork, yet there were numerous cases of "if only I know ..."

Why can't life be menu-driven or at least have an 'undo' feature?

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Nevertheless, here's some "hot" snapshots of R2 (just taken this evening) that surely can help to cheer mummy up ... his smile is simply contagious, isn't it ??