I am ham KD5NCO....Tallest was 90 foot.... nearly had to call 911 for FD to come get me down,,,, going up...no problem..then looked down and froze for over three hours before I forced self to slow climb down....
Hanging out door of Huey or UH 60...at 1000~2500 AGL no problem
Parachute with T-10, no problem
Repel off earth or out of helo @150+ foot....no problem
Top of swaying steel antenna...screw dat...never again!