giant binary download buffer displayed

[jidanni@xxxxxxxxxxx]

On http://zh.wikipedia.org/wiki/台灣大道
I click the link...

Reading http://taiwanblv.civil.taichung.gov.tw/TCCCIV/Web/DownLoad/臺灣大道對照表10107.xls...done

Then it displays the whole megabytes file in a buffer and asks me the
download type.

Don't you think displaying (the bottom) of a giant binary file in a
buffer is not so wise?

Actually nothing bad seemed to happen, and the buffer was deleted
successfully after I made my choice, but it still seems kind of
dangerous memory-wise.