80 to 100 is a big jump. Sometimes it’s not about challenging
yourself, but also about your ego. If you let your ego get in the
way of sensibility, you’ll compromise on your form and may end up
getting injured. The lat pulldown is a lot more forgiving, but try
jumping 25% on your squat or bench and see where you end up.
Probably on the floor with the weight somehow on top of you.