I give you the Horse in the ground
Really enjoying the game, I have spent some time on the main story & I've attacked Fort Mercer now but Bill Williamson has escaped to Mexico.
Arriving at Mexico I am greeted by some friendly locals & Landon Ricketts, an old time gunslinger teaches me some more dead eye skills.

So, a one-star mission. Hunt some beasties, get their guts. 50 minutes to do it. Dead easy, I thought. As it’s an easy one, I thought I’d hunt the aquatic beasties, on the basis that it would give me a bit of practice with the (perfectly adequate) controls. And it was all going fine until the bloody Lagiacrus turned up. Nasty ornery beastie can spot you a mile away and comes straight at you, stunning on the way. So, several frantic minutes later, after much darting between areas trying to evade the damn thing, I finally handed in the mission – with less than a minute to spare :-/
