Verb
bang on the door (third-person singular simple present bangs on the door, present participle banging on the door, simple past and past participle banged on the door)
Alternative form of bang down the door
The repressed memory is like a noisy intruder being thrown out of the concert hall. You can throw him out, but he will bang on the door and continue to disturb the concert. The analyst opens the door and says, If you promise to behave yourself, you can come back in. Theodor Reik