Numerous models of solar flares have been proposed. Recently the CSHKP or "standard" model became very popular and often cited. It's popularity is very strange since it has several serious weakness. On my seminar I will show the solar flare which completely do not fit the standard model, but fit perfectly the scenario proposed 50 years ago by Sweet. I will present the observations of the failed eruption of a magnetic flux rope recorded during an impulsive phase of a solar flare. The restructuring of the magnetic field followed by the expansion of the magnetic flux rope was observed. After an initial acceleration the expansion was stopped abruptly. The main factor responsible for that is the magnetic tension of loops lying above expanding structure. The observational evidence supporting this thesis will be presented.