They finally finished their calculations after night upon night of sleep deprivation. They had managed to show conclusively that their new machine was capable not only of time travel, but would as a welcome side effect cure their personality problems as well, effectively preventing squinting eyes when smiling for the pic, canceling dropping necks and hairdos that don't fit the smirk, and even curing what must seem irreperable irregularly spaced teeth. Theirs was the true happiness of the moment; barely ten seconds later Andy dropped the drawing board, erasing crucial portions of their formulas. Their machine would have cured his clumsiness too...