Q: What did the computer say when it fell into the quicksand?
A: “Help me! I’m syncing!”

Explanation: When someone falls in quicksand they start to sink, that is, go down into the sand.  When computers connect with other computers they “sync,” a word that means to synchronize.  That is often how computers share information like when a person syncs an iPod with a computer to share music.  The words sink and sync sound the same which is why this joke is funny.