What Unusual Dangers Did US Troops Face in Vietnam?

During the Vietnam War, Vietcong soldiers put explosives in soda cans after
noticing that US troops liked to kick cans.

Improvised Explosive Devices, or IEDs as they're now known, have become
commonplace in 21st century warfare. But these types of booby traps have
been around for years. During the Vietnam War, the Viet Cong and North
Vietnamese Army found numerous unexpected and deadly ways to attack
American soldiers. For example, early on in the Southeast Asian conflict,
the VC noticed that American soldiers liked to kick empty soda cans that
were left lying on the ground. So the VC rigged those cans with explosives
and planted them along regular patrol routes. When the cans were kicked
down the road, they'd explode, causing injury or death.
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