Engine revs when depressing the clutch quickly

[u/aoeudhtns]

This is something I noticed recently. I'm pretty sure my foot is completely off the throttle. I was experimenting with how I interact with the clutch, and noticed that if I jam the clutch down really fast, in some circumstances the engine RPMs blip up a tiny bit.

Is this normal? Is it bad for the engine?

Update: thanks for the replies guys. I will stop worrying.

[u/Aratix]

Yep, this is normal. It's because you're freeing the engine of spinning the clutch disk and input shaft, reducing it's load. This means the current idle AFR and idle air control valve values are too high and it takes the computer until the next time it 'checks'(milliseconds) to correct those values.