Interesting website exploring the possibility that Enoch is the 2nd witness:
 
Pineman
 
 
http://www.geocities.com/cobblestoneministries/BibleAnswer_Two_Witnesses_Rev11.html
 
 
"Because both Enoch and Elijah have not yet died and they are the only ones in the Bible who were uniquely taken or translated from the earth into Heaven, they will be the ones who will reappear in the Tribulation Period. Moses has already died once so he cannot die again.
 

"These two men have yet to die and they are very special because God is going to send them to the earth for 3 1/2 years to preach and do many marvelous and awesome signs and wonders: Shutting up heaven, halting the rain, turning waters into blood, countless plagues, fire will proceed out of their mouths. They are going to be hated so much so that the people of the earth will send each other presents for the three days, as the prophets remain dead on the streets."