What happens to a person when they eat cake while high on crystal methamphetamine?

What happens? Does the joy disintegrate like tears in the rain? Or is it multiplied tenfold? Not that I involve myself in such chemicals, but I am quite a cake connoisseur, so it is a concern.

: http://alcoholdrugstreatment.info/what-happens-to-a-person-when-they-eat-cake-while-high-on-crystal-methamphetamine