burn bridges in front of
burn (one's) bridges in front of (one)
To do something that is likely to cause problems later. That kid isn't bullying you, so if you tattle on him to the teacher, you're definitely burning your bridge in front of you.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
burn one's bridges in front of (one)
Fig. to create future problems for oneself. (A play on burn one's bridges (behind one).) I made a mistake again. I always seem to burn my bridges in front of me. I accidentally insulted a math teacher whom I will have to take a course from next semester. I am burning my bridges in front of me.
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.