Coronary bifurcation lesions are commonly encountered, and side branch compromise is a major complication of these bifurcation interventions. Jailing a wire in the side branch is the most common method of significant side branch protection. Jailing a balloon in the side branch is a less well known and seldom practiced strategy of side branch preservation but tends to have lower occlusion rates as compared to conventional jailed wires. Various modifications have been applied to the original jailed balloon technique to further improve side branch patency. Complications arising from this technique have been limited to case reports only and relate mainly to calcified vessels.