Sounds like some weird SF plot, or an Onion article, but apparently it’s true:
http://www.boston.com/news/odd/articles/2011/05/17/china_watermelons_burst_from_excess_chemicals/?camp=obinsite
No worries; it’s just a Gallagher experiment gone wrong. 
Any word if that drug is safe for humans? 
It’s sold as a wafer-thin mint.