the coolest trick (which none of you have mentioned yet!) is to
take a small chip of dry ice and put it into an eppendorf tube
and close the lid securely (WARNING: do this in the sink or you
will put someone's eye out!).
this is especially amusing when you can slip it into a closed
drawer without being noticed.
email:nyneve at u.washington.edu
Visit me on the Web: http://weber.u.washington.edu/~nyneve/
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