Abstract : We study experimentally different situations of impact of solids onto liquids. We first study the impact at large velocity of a solid sphere in a liquid bath. We observe the sphere's deceleration. We deduce from these laws the force exerted on the sphere by the fluid, and show that a highly sheared foam behaves like a viscous fluid. Such violent impacts also cause air entrapment. We describe the shape of the cavity created in the liquid : tunnel-like in foam, vase-shaped in a viscous oil, it can look like a spiral in water if the projectile is spinning. We then focus on low-velocity impacts on liquid films : soap films or viscous layers spread on solid surfaces. Capillary forces are comparable to the projectiles' inertia. We show that a bead hitting a film can be stucked in the liquid. A foam, containing a large number of such liquid films, can then slow down and trap particles by capillarity.