I can't go through with it - You say it like you're the biggest loser ever. Maybe you're

You say it like you're the biggest loser ever. Maybe you're just too tired or too afraid to do the thing. Either way, you're gonna get laughed at.

'I can't go through with it' said after being called out in class.

'I can't go through with it' said when he had to take the test.

'I can't go through with it' said when she had to face the teacher.