they don't notice the blockage so they think they can swim right through
heads
to show how much the band rocks.
When they're young, they bang heads for practice, like moose. When they're grown up, though, they do it to fight, to attract mates.
no
Since brushes are not living organisms, it is not possible for them to bang their heads. However, it is possible for a brush to bang your head while brushing your hair if you are not careful.
they bang there heavy heads on a hard rock or the ground
Sure. Cyclists are moving at speed, with their heads at a height above ground. If they fall, they may bang their heads.
They could be seeing themselves in the reflection of the glass of your tank, but since goldfish do not have the capacity to recognize themselves in a reflection they think it is another goldfish and attempt to swim towards it. It has nothing to do with having a short memory span as the previous answer said, because goldfish actually have a long-term memory span of about three months.
Do you have a question about the theory?
She felt like she was banging her head against the wall trying to explain the concept to her stubborn coworker.
I don't think the big bang has an opinion about the Bible. Is it against the teachings of the Bible? The Bible says God spoke and the universe leaped into existence. The big bang could be the mechanism for this, or it could not be, it is only a theory.
Well, no Sakura will never "bang" Sauske. Knowing Sauske left and is know against them, theres no chance at all that she'll get to "bang" him.