It's because the hitstun for Zamus' jabs are so little, as well as the fact the duration of the jabs are longer than the histun; or so I've seen. In short, unless the player you're jabbing reacts slowly, they're practically guarenteed to grab you first. You should watch out for that, and keep Zamus' AAA to a minimum. ... I really should of mentioned that before, sorry. .-.