Wife calls her scientist husband. "Honey! Its Saturday night you are late."
Husband : " I am busy with my team in an experiment."
Wife : "Whats that experiment?"
Scientist Husband : "We've just added a derivative of C2H5OH with ambient temperature H2O and aqueous CO2.
To cool this mixture added some super low temperature, solidified H2O.
Now while waiting for some protein, we are fumigating the lab with vapours of nicotine.
It's 4 or 5 round experiment. So I will be late."
Wife : "Oh dear. I won't disturb you. You take your time."