The noise you hear when you take something out of a dryer is likely due to the sudden change in load on the motor and the movement of the dryer's components.
When the dryer is running with a load of clothes inside, the motor is working to rotate the drum, which tumbles the clothes for even drying. The motor has to overcome the resistance of the clothes and the weight of the drum as it spins. During this operation, the components of the dryer are in motion, and the entire system is balanced to minimize vibrations and noise.
However, when you open the dryer door to take something out, the sudden removal of clothes alters the load on the motor. The motor no longer has to work against the resistance of the clothes, and this change in load can lead to a momentary increase in motor speed. Additionally, the absence of the clothes in the drum can result in some imbalance, causing slight vibrations and noise.
The noise can also be attributed to the metal components of the dryer cooling down. As the dryer runs, the metal parts heat up due to friction and electrical resistance. When you open the door, cooler air from the surroundings rushes in, causing the metal to contract rapidly, resulting in creaking or clicking noises.
In most cases, the noises associated with taking something out of the dryer are normal and not indicative of any issues. Dryers are designed to handle such load changes and fluctuations. However, if you notice any unusual or excessively loud noises, persistent vibrations, or other irregularities during dryer operation, it may be worth having it checked by a professional to ensure there are no mechanical problems that require attention.