I am quite new to flash loan and I don't fully understand it. I've been reading on flash loan attacks lately and notice often times it involves a huge dump on Uniswap to skew the price of a coin. I am wondering if I can take out a flash loan, say 10000 ETH from AAVE, and dump all that in Uniwap to exchange BTC. Is this going to increase the price of BTC for a short time (a few seconds)? If yes, then what I can do is I immediately sell some of my own BTC on Uniswap after I skewed the price of BTC with the flash loan and buy it back when the price corrects itself. I don't even need to pay back the flash loan since all I need is to skew the price for a short moment (a few seconds) and do arbitrage with my own holdings. Pretty sure I'm missing something here but I don't know which part is wrong.
My second part of the question is say during a flash loan attack I manipulated a price of some coin. If a user queries the price of that coin in the middle of my flash loan attack, is that user seeing the manipulated price or the normal price?