Exclusive events for central collision of 94Kr on Ag/Br emulsion at a
bombarding energy of 70-120 MeV per nucleon point to an extremely larg
e flow energy of the order of 10 MeV per nucleon for intermediate mass
fragments. We show that this large radial flow energy is associated w
ith an explosive breakup of the excited matter in the very early stage
of the collision process.