Wherever I saw this idea originally (I think it may have been the TV show Braniac) cut one grape in half so there was just a little sliver left connecting the h

Wherever I saw this idea originally (I think it may have been the TV show Braniac) cut one grape in half so there was just a little sliver left connecting the halves which gives a really nice arc between them. I later reckoned a cherry tomato would probably do the same thing and it definitely does. I remember at the time thinking the grape gave a whitish-blue arc where the tomato gave an orangey-red one but not sure whether I was imagining that. Probably two of the safest microwave tricks to do, as it is just food after all, but the CD one is definitely worth the temporary smell of burnt plastic.