[Walter]

hand 1 is pretty similar to a hand that was discussed recently. you realize that if you don't fill up on the turn, you must be beat given how low your kickers are.

hand 2 your opponent could have had a set that he was afraid to bet b/c of the possible straight and lost to set-over-set. he probably raised thinking you had two pair and/or draw and that his hand was best.

if he had a set or a straight, he certainly made a grievous error by not betting his hand on the flop. both those hands are quite vulnerable, as you have shown.