In the past systemic bank run meant people going to the bank and taking physical cash (banknotes) from the banks until they ran out of money. However today you cannot withdrawal significant amount of physical cash since the banks limit the amount you can take (even in normal circumstances). I've seen modern bank runs where people simply transfer their money from one bank to another. But this is bank run only on the first bank that simultaneously increases the liquidity of the second bank.

So... Is systemic bank run today possible and how would it look?