@unlofl On the old days of dialup connections, we used to login on IRC and quickly rotate usernames from "com1" to "com5", saying "hi" privately to everyone in the chat. mIRC was the "de facto" Windows IRC client and for every private chat it would create a <username>.log file.
Since modems would use something from COM1 to COM5 to connect, that would either hang up the connection the mIRC user or make their client crash.
@unlofl (My guess for the disconnection is that modems had a couple of commands you could send to them, like "ATDT <number>" for dialing up. Since Windows would mix the COM* file with the COM* port, it would send the content of the log to the modem, which would not recognize it and simply hang up.)
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