hoist with (your) own petard

to be harmed by something that was intended by you to harm someone else.

The most enjoyable moment in any action film occurs when the villain is hoist with his own petard.

Etymology: based on the literal meaning of hoist by your own petard (= blown into the air by your own explosive device), an expression made popular in Shakespeare's play, “Hamlet”

• hold horses
• Hold horses!
• hold in check
• hold it
• hold its own
• hold off
• hold off something
• hold on
• hold on for dear life
• hold on like grim death
• hold onto
• hold on to for dear life
• hold on to someone for dear life
• hold onto something
• be as deaf as a post
• be as dry as a bone
• be as dull as dishwater
• be as dull as ditchwater
• be as easy as abc
• be as easy as falling off a log
• be as easy as pie
• be as fast as all get out
• be as [fast/hot/thin etc.] as all get out
• be as fit as a fiddle
• be as flat as a pancake