Tell us about yourself!
The truly scientifically literate among us have no difficulty translating on the fly between metric and imperial units. For example, my favorite unit of length for really precise measurements is the nano-fathom.
Please do not use dry ice! It is frozen CO2. CO2 is heavier than air and will gradually displace it, along with the oxygen in it. And CO2 asphyxiation is particularly insidious because you won't know that anything is wrong -- right up til the moment you black out, probably forever.