Continuity mistake: While talking to Marco, when the bartender asks them if they want something else, James McGill is holding a beer bottle in his right hand. In the next shot the bottle is in the center of the table. (00:20:00)
Continuity mistake: During Jimmy's rant during Bingo, B5 is flashing on the main board (the last number he read out loud). It switches to B2 flashing when he says he got on top of the BMW. B5 is then seen flashing again, on the board in the back, when he's finishing his rant.
Answer: The bulldozer could be disassembled, the individual pieces carried down, and then reassembled once underground.
BaconIsMyBFF