of course i mourn lemmy, any metalhead should, he was just that influential to the genre, above and beyond how rock and roll the man was.
the proper way to mourn him, though, is to drink a slug in his name and crank the volume louder.
regarding bowie, i'm kinda stunned, i didn't listen to the radio this morning, but meh, he had a good run. play his songs, and remember the legacy. offer the condolences to the next of kin, those who can still appreciate them.