I injured my “monster” cactus, which was hanging over four feet from a tree outside.  I was not paying attention and banged into it and tore partially one of the four foot tentacles.  I duct taped the ripped tentacle together and then I hung it off the ground by some wire to release some of the pressure on it.  The tentacle of the cactus started to tear at the impact point of the wire so I put it in a sling using a discarded sock so the rip might not continue.  I felt bad about it and hope the tentacle closes up in time.