i had a similar incident too the last time i played a game against my store's manager;
my last 2 models were a vet sergeant w/plasma pistol & a plasma gunner.
in a last act of retribution, i decided to rapid fire both guns into the rear of a rhino.
my rolls to-hit were; three 1's & one 2. i failed all 3 armour saves with a further roll of two 1's & one 2.
it took about 5 minutes for everyone, including myself, to stop laughing!
(note: this was back during 3rd edition so you still only overheated on a 1 even when rapid firing...)
cheers!