Popping back, also known as backfiring.
popping
no
No, you are just popping little bubbles, it is fine.
Sometimes you can't stop your veins from popping out. But if you gain some weight, and stop working out so much they will go back to "normal"
Reference back to a previous event in the chronology of a story?
The year, make, model and engine would help us.
It grows back! Then you get the pleasure of popping it again!
some drivers drive their cars back while others are towed back by their crews
Yes. Because behind means on the opposite side of a reference point. If the reference point is your back, then behind it is in front of you. Same with your front. If your face/front is the reference point, then behind it is your back.
no
If you are hearing a loud popping sound from your carburetor while the engine is running, then that is engine back fire. It is possible that your timing is off at the distributor if it happens often.
No, actually you get an endorphin release from it. Endorphins are natural body chemicals associated with pleasure