We use Hi-lift jacks in the FD as a tool in the tool box. In a emergency situation you can use them to pull, push, clamp, spread, lift, or lower. Having a winch and/or a hi-lift jack is a tool, however if you do not practice with the tools in a emergency situation your tools may not work properly. Every year when I organize a vehicle recovery clinic, someones winch, winch line/cable, or hi-lift jack does not work or malfunctions. Get out and practice under controlled situations, know your tools/equipment and know that they will work when needed under stressful emergency situation.