Similar thing happened to me a couple weekends ago. Camping in the Jemez Mtns here in NM, took my big Block target and was drilling my broadheads @ 40yds in about 4" groups, not bad I am thinking, let's do it again!. 2nd round, 1st arrow, somethin' FUNKY happens when I release- arrow kicks right, last 6" of arrow hits my dropzone rest, wobbles its way down the lane, hits the target and I see the rear of the arrow hit the target and bounce back about 2 feet. What the...?! I go look and there is my Beeman ICS, broken...sigh...almost cried...my #2 arrow dead (#1 got bungled up when my elk fell on it last year...hee hee). Dunno what caused that to happen, have never done that in 5 years of shooting, nor did it happen again after that. Oh well, it hit about 6" low left, might have still been a vitals shot if it'd happened in the field. Hope it doens't tho... Down to 4 arrows now myself. My wife tells me "...you only need one, what's the big deal?" LOL