I am new myself to actually owning a horse. I've been riding nearly my whole life and came across this wonderful horse that my cousin was giving away and ended up getting her, along with her sister. This thread isn't going to be much about wanting to know something, but to inform you on something that could happen to you.
It started off by taking my girl out of the pasture and tying her to a hitching post to eat the long grass while I braided her hair. I gave her a little bit too much slack (as you will soon realize when reading the rest) so she could get a wider range to eat. But when one of my peacock called and jumped off it's perch she spooked and I backed away. She walked towards me and stepped over the lead rope and backed up causing it to wrap her leg up. She instantly panicked. She ended up pulling out the old rotted hitching post and running through the people walking door into the barn trying to get to her stall, jamming herself between the tractor and a medal rack. Falling when the hitching post hit the door because it didn't fit through it. I was lucky enough that this horse trusted me and allowed me to hold her in place while someone cut the rope and unwrapped her leg.
It was the most terrifying thing and I nearly hyperventilated. But after having a vet come out I was told it was just a major case of rope burn and I have been giving it medicine and she is making a full recovery and still the happy girl she was a minute before. I started researching this and I found that this has happened to many, MANY people that I would care to mention. So it gave me the idea to share my story in the hopes that someone will learn from this. So I please ask that you only give enough slack in the rope for your horse to put their head down. I was lucky enough that the post gave. If it didn't I might not have her anymore.
I hope you read this and I hope you store it in your mind in case you ever think of giving your horse more slack. You never know if this will happen to you!