Two scientists walk into a bar. The bartender asked the first scientists what he would like? Scientist 1: I'll have a glass of h2o. The bartender then asked the second scientist what he would like? Scientist 2: I'll have a glass of h2o to. A little later the second scientist falls over dead.

Two chemists walked into a bar. *corny chemistry joke* The first chemist said ""I'll have H20."" So he drinks his H20 and feels fine. The second chemist said ""I'll have H20 2."" He dies. He couldn't handle the Hydrogen Peroxide.

Two scientists walk into a bar.... The first scientist tells the bartender he will have some H2O. The second scientist tells the bartender he will have some H2O too. Several minutes later, the second scientist is dead.

be ""chemistry""ful before you ask for something Two man walk into a bar, first man to bartender, ""Can I have an H2O"" As the bartender tends to the first man, the second man ""That sounds cool, can I have an H2O too"" and they found the second man dead after some time