if you get stuck in the wall, just use /rewind after a while and you get "reset" to the previous position where you werent stuck.. or use ShadowStep.. or gate.. or TP him..
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and /corpse works through walls, so if your within the radius, you can drag it (means should be able to drag it from water if the corpse is at heart spiders)
and im pretty sure many people are around guk that could help you.. but you probably where online at exact the only 3 hours where guk is empty :>