It's that time again! Jim Cramer rang the lightning round bell, which means he gave his take on caller favorite stocks at rapid speed:

Thermo Fisher Scientific: "In our charitable trust, we made a sale as we described in our actionalertsplus.com bulletin, that the stock had run so much, we were concerned that you would get a chance to buy it lower. It has come down, but not low enough to be able to pull the trigger."