Python disemvowel challenge

This is for the "disemvowel" challenge in Python collections. Kenneth asks us to make a function called disemvowel that takes a single word as a parameter and then returns that word at the end with no vowels (lower or uppercase).

I figured out a way to solve it! But along the way I tried the following code:

def disemvowel(word):
    vowels = ['a', 'e', 'i', 'o', 'u']
    word = list(word.lower())
    for letter in word:
        if letter in vowels:
            word.remove(letter)
        elif ValueError:
            continue
    word = ''.join(word)
    return word

That did some (to my mind) strange things. Here are some words an what would get returned... abebibobu -> bbbb AbeIAsEssa -> bisss My name is Jeremy --> my nm s jrmy aAeEiIoOuU -> aeiou

So... it's doing something along the right lines, but clearly wrong. My question is what is actually happening with my script? Why is it taking out some vowels and not others?