1. Btc pump then alts dump
This happens when that pump without any reason, lasts for a few minutes to a few days.
2. Alts pump then btc dump
This is not like alts pump only when btc dumps, but when it is in sideways too because the money is being shifted from btc to alts.
3. Both btc and alts follow each other
This happens when a bullrun begins where almost every coin follows btc's rally as those who cannot buy btc due to high price, go for altcoins to save fees or for investment.