Michael: That Darth Vader is from canon-dimension, not alt-dimension. Alt-Clark's newspaper is owned by James Olsen.

Alt-Clark is not familiar with
this Darth Vader, only the one from the movie.
Mythbusters links:
Mentos & soda and because I couldn't find an exploding head example...
Pop Rocks & Soda 
Watch out what you eat. Enjoy.