Alyson Hannigan of Buffy first appeared in My Stepmother Is an Alien - back in 1988. The funny thing is that her partner there was Seth Green - who was her boyfriend in Buffy. Before she became a lesbian. Frankly speaking I liked Seth Green better. They made a good couple.
A friend of mine is somewhat addicted to chainsaws and he is constantly looking for chainsaws product placement (or just appearance) in movies. His latest finding is Buffy - episode 4 of 4th season. Giles with chainsaw is going to save Buffy the Vampire Slayer. I asked him to share and this what he came up with: