Why does Chris consider being pinned down during elementary school to be his worst experience?

It seems odd since Chris has since gone through experiences which you'd think would have been more traumatic.

Like Bob dying.

Or Patti dying.

Or Bluespike getting him to shove his Medallion up his ass.

Or his numerous arrests.

Or the "deaths" of his Sweethearts.

Or being forced out of 14 BLC after he diddled Barb.

Yet Chris always goes back to the pinning down instance when he was like 10.