The 15" chem lights I have used are actually designed to be throw and activate when they hit. Activating it one handed would be really easy, I'll check next weekend at a training event.
Not having watched either of the movies in question, I was just making a guess based on the description <img src="/images/graemlins/grin.gif" alt="" />
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"Trust in God --and press-check. You cannot ignore danger and call it faith." -Duke