Major, Major Plothole
When Arkin entered the house the first time, there were no traps anywhere. The Collector came in after him. Suddenly, there were traps EVERYWHERE. How in the world can The Collector set up all those traps in such short time span? or did he already entered the house and set the trap well before Arkin came in.
If so, how did Arkin move around the house without setting any traps if The Collector came in first?