Good riddles or tongue twisters

[~dark-senju~]

post any good riddles or tongue twisters

for example:

riddle-
poor people need it rich people have it.
if u eat it u will die.what word am i talking about.

tongue twister-
(say this fast about 4 times.{it's hard lol}) Peter Piper picked a peck of pickled peppers.
A peck of pickled peppers Peter Piper picked.
If Peter Piper picked a peck of pickled peppers,
Where's the peck of pickled peppers Peter Piper picked?