WARNING: This footage is not for the faint of heart.
This is why you should never go to the beach. Ever.
In case you need more convincing, just look at this shark in action. Those poor people didn't stand a chance! At least there was a festive song, though.
If you're looking for your own shark-y prank to pull, we like this one! All you need to do is a shovel and enough time to dig a sizeable hole. If you're pressed for time, you could also cut your friend's leg off for real.*
*We don't recommend this.
If the above videos were a tad too intense, here's a slightly less traumatic video. We're super impressed by these LEGO creators!