.... when you've just engineered a charge to get 157 attacks on a single daemon prince that are all hitting on 3's......
.... your opponets just deepstruck his whole guard army and only killed 12 of your 98 tyranids....
....your opponent deploys his footsloggin BT's (that are all I3 due to vow) within 18" of your nids....
.... your opponents are lookign very sullen at the idea of facing your maines, AGAIN!.....
.... you just roll 7 6's out of 8 dice for 2 asscannons vs your opponents prized Daemon prince....
(finally)
....the look you see on your opponents face when his entire kroot army infilgays within 12" (or less) your dev unit with 4 ML's and an Auspex. MWAA MWAA MWAA!