>be me, DMing my first campaign
>players are fighting the BBEG, a High level rogue after interrupting his ritual to attain godhood
> he keeps throwing poisoned daggers from the shadows and turning invisible after they find and attack him
>he reduces them to 0 str, paralyzing them, one by one until only the monk is still up due to lucky saves
>BBEG being a cocky bastard and with the monk having only a few hp left goes into the open and taunts the monk
>they charge each other
>monk wins initiative, rolls 20 to hit
>rolls 20 to confirm crit
>silence
>cue player cheers
and that is how my first campaign i ran ended perfectly