Found them

"Should we break it?"

Darren's sudden, blunt suggestion broke the silence.

"What the- Are you dump? We would be screaming out loud that we are intruders if we did something like that! We've come all the way here as stealthily as possible to end up breaking the main entrance?"

Alan looked as if he wanted to beat up Darren for even suggesting something that would ruin all of his efforts in the past month.

"Then what?"

Darren folded his arms and glared at Alan.

"Do you want us to keep waiting outside of the door like this? We've been waiting here for someone to enter or exit the warehouse for 20 minutes, and nothing has happened yet! That was your suggestion!"