does the smoke from a smoke grenade emanate from the top of the grenade or...

[jay]

...the bottom of the grenade? top/bottom determined as if one was looking at a schematic sketch of a smoke grenade.

 

[Vad]

Nobody knows, it's too smoky to tell.

 

[Jasmine]

The top because you pull the latch and it spreads

 

[Rick]

Top