Forcefields periodically discharge vertical arcs of purple energy that deal contact damage and reflect any projectile or thrown object that collides with them, similar to the shield.
After two seconds of activity, the forcefield will shut off for four seconds before it can energise again.
Forcefields cycle automatically, and do not respond to the Spelunker's presence.
Forcefields will cease to function if their base conduit is destroyed by an explosion, so can be disabled by planting a bomb nearby while they are recharging.
Death caused by rebound bullets show as "Death" with no explanation, just like when the Ghost kills you.