Can You Make Antimatter in Your Colliders at CERN?

Antimatter is one of the most efficient ways to release energy inside matter. If it touches regular matter it's going to destroy the earth basically right? So yes if you are making antimatter in your kitchen be very careful. We actually have done a few experiments with antimatter that do ask this question about the effects of gravity on these particles but they are very very difficult to do and not as sensitive as we'd like yet.