You can pull the pin on a grenade and hold onto it until the last second before its detonation, making it harder to avoid.
Prerequisite(s): Dex 11, proficiency with grenades
Benefit(s): As a full action, you can draw a grenade and make a ranged attack with it. If you do so, the grenade’s Reflex save DC is increased by 2. If your attack roll is a natural 1 (the d20 comes up 1), the grenade instead detonates at a randomly determined grid intersection of your space.
Starfinder Character Operations Manual © 2019, Paizo Inc.; Authors: Alexander Augunas, Kate Baker, Simone Dietzler, Jennifer Dworschack-Kinter, Leo Glass, Sasha Lindley Hall, Amanda Hamon, Vanessa Hoskins, Jenny Jarzabski, Jason Keeley, Lyz Liddell, Luis Loza, Ron Lundeen, Crystal Malarsky, Robert G. McCreary, Conor J. Owens, Joe Pasini, Owen K.C. Stephens, Jason Tondro, and Landon Winkler.