So I'm doing the story mission where you have to lasso a horse. Anytime I lasso one however, no matter how close or slow both horses are going the lasso immediately breaks. The prompt to hold the lasso pops up for half a second before the lasso breaks. I had a horse that was standing totally still and I lassoed it five times in a row, each time the rope broke off immediately in the same way. I've tried both pressing and releasing the trigger and holding it down and it doesn't make a difference. Is this a bug or is there something the tutorial messages aren't telling me?

Don't lasso too far.

Hold down the left trigger

" Hold down the left trigger "

I had an issue with the lasso at first. I was holding both triggers, which resets the throwing animation. 

Ah I see so you hold the left trigger. Kind of counter-intuitive since you throw it with the right one.

Yeah, I had the same problem but figured it out.

lasso cant break silly

"lasso cant break silly "