I played the Eridian slot machine in Sanctuary and it gave me this grenade:
I haven't noticed until today the second pickup option that is also mapped to the E key. It's description says "~4.3s" which I understood as "around 4.3 seconds" but why is it there? I also played the regular cash machine and the gun I got from it also had this option. Nothing in the game controls seems say anything about this. What does it mean?