You can push to bomb carrier into the pit. Someone else also asked the same question

Pit Drops are what I mean by Resets. I'll try.

No, pitting a bomb is what people call Resetting it

Driving a bomb back means that you simply hurl the bomb carrier back far enough for the Announcer to comment about it
"You've driven the bomb back!" and all that jazz

Dropping the bomb carrier into a deathpit is not what the objective is looking for

Originally posted by Sntr:

No, pitting a bomb is what people call Resetting it

Driving a bomb back means that you simply hurl the bomb carrier back far enough for the Announcer to comment about it
"You've driven the bomb back!" and all that jazz

Dropping the bomb carrier into a deathpit is not what the objective is looking for

OK then: what's your estimate on how far that is, and what maps are best to try it on?

I'll be honest with you: I have no actual idea on the distance that is required before the game logic ticks that you've driven the bomb back.

As for the best maps to do this on: I think it's Barren because of that left-side route (airblast the bombcarrier to the lower path once he gets to that spot where the fence has a gap in it) because that's the map we used to verify that the objective works.

Airblasting the bomb to the lower area of Coastrock once it gets near the hatch is probably far enough to also count as driving the bomb back (depending on the bomb path, at least)

Then there's Trainyard where simply losing a gate and waiting until it re-closes will tick this objective a lot of times due to the way the map is built (this has at least happened a couple of times during testing so it may or may not count for the objective, as well)