Warning jokes

So my friend and I went camping at a Cold Lake Campground and he jumped into it without any warning, and so I asked him, "Wat-er you doing?"

Tombstone engraving: "I TOLD you I was sick!"

If your girl smells like tilapia, don’t let her on top of ya.

Be warned, if you are in the shower, I might pikachu and it's not my fault if I see any jigglypuffs.

Why should you be wary of stairs? -- Because they are always up to something.