Is Talon falling within pushing distance? To be pushed into the gem and then push back off the wall?
Also, if it looks like Talon is falling fast enough that leaving the area would hurt him from falling, and that once receiving the gem it looks the same, Joshua will get his scroll of feather fall ready to cast as he leaves the zone that magic stops being effective
As Talon is propelled towards the gem as he continues to fall, he would grab the as he falls past. Feeling the gem pull the magics from him, he would let out a loud Squak that echos from the pit at first and then from the ceiling as he continues through the cycle. When he approaches the opening where his companions are standing, he would try to throw the gem towards the opening before attempting to grab the end of the staff!