My first job in IT as a 19 year old learning the ropes.
Helped the IT manager with some cabling twinax cabling work for AS/400 that ran down 4 floors in a conduit shaft, problem was, we didn't have access to 2 of the floors as they were owned by other companies, somewhere they were cable tied very firmly so couldn't move them,.
had the bright idea of cutting the cables at both ends to which we had no access so they could be moved.
Then, by stripping back the plastic, twisted the cables, soldered them together and covered them in insulating tape and left it at that.
Wasn't any complaints on the Monday morning from the AS/400 people so job well done and dodgy cable soldering hidden.
I was the 19 year bright spark who said to cut the cables and resolder, just fortunate there was enough slack at either end to do it.