Ha, A-Level physics. <br />
Virtual particles are things that are created out of nothing for a tiny amount of time and disappear into nothing between two things that react. <br />
Electromagnetism has the (virtual) photon,<br />
Strong interaction has the pion,<br />
Weak interaction has the W- or W+ boson,<br />
Gravity theoretically has a graviton which can't be detected with current equipment.<br />
OC probably won't get far and will end up being deleted.