Yen in the vault not touching the floor.
So hes in the vault having to back-flip onto the cabinet then make his way to the doors to set up the explosive charges so Danny and Linus can set theirs up on the other side.
This is so he doesnt touch the floor or it will set the alarms off.
So how come once the charges go off and all the rubble hits the floor and the alarms go off anyway and they walk in what was the point of avoiding touching it in the first place?