Dr Teur volcano

Hi everybody.
This is a comic strip I did for a website I designed for my work.
The story is about a Dr. who explain science for little kids (since the website is for kids) and poor guy, almost each time it finished with an explosion.
This is the comic strip n°3/5

It is in French but for all non-French users this is a little translation :
Panel 1 : There are two types of volcanoes: effusive and explosive ones
Panel 2 : Like you can see, here we have a effusive one
Panel 3 :
Panel 4 : Oh yes... sometime effusive one are also explosive...

Ps : yeap I know it is write "Shadowshark..." but it is because one of my nickname on Internet is Shadowshark, sadly I could not take it for deviantart since someone already did T_T